Exam 6: Factoring Polynomials

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Solve. -Within a group of n\mathrm { n } people, the number of possible handshakes, NN , is given by N=12(n2−n)\mathrm { N } = \frac { 1 } { 2 } \left( \mathrm { n } ^ { 2 } - \mathrm { n } \right) . How many handshakes are possible at a meeting if 16 people are present?

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Factor completely. - 12x2+17x+612 x ^ { 2 } + 17 x + 6

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Factor the polynomial completely. If the polynomial cannot be factored, write "prime." - 2x2−19x+452 x ^ { 2 } - 19 x + 45

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Factor out the GCF from the polynomial. - 28m8−8m6+28m428 m ^ { 8 } - 8 m ^ { 6 } + 28 m ^ { 4 }

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Solve. -Two vehicles leave the same corner at the same time and travel at a right angle to each other. One vehicle travels 2 kilometers an hour faster than the other. If after one hour the vehicles are 10 kilometers apart, find the rate of each vehicle.

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Factor completely. - 9x2+x−1409 x ^ { 2 } + x - 140

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Factor the sum or difference of two cubes. - 512−t3512 - t ^ { 3 }

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Solve the equation. - x2+5x−36=0x ^ { 2 } + 5 x - 36 = 0

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Solve the equation. - 7x2+21x+14=07 x ^ { 2 } + 21 x + 14 = 0

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Factor the perfect square trinomial completely. - x2−10x+100x ^ { 2 } - 10 x + 100

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Find a positive value of the given variable so that the trinomial is factorable. - 11x2+bx+1;b= ? 11 x ^ { 2 } + b x + 1 ; b = \text { ? }

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Factor the four-term polynomial by grouping. - 15x2−10xy−18xy+12y215 x ^ { 2 } - 10 x y - 18 x y + 12 y ^ { 2 }

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Factor the sum or difference of two cubes. - 54x3y6−50x6y354 x ^ { 3 } y ^ { 6 } - 50 x ^ { 6 } y ^ { 3 }

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Factor the perfect square trinomial completely. - z2+4z+4z ^ { 2 } + 4 z + 4

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Fill in the blank with one of the words or phrases listed below. Not all choices will be used and some choices may be used more than once. factoring quadratic equation perfect square trinomial 0 greatest common factor hypotenuse sum of two cubes 1 difference of two cubes difference of two squares triangle leg -The expression a2−b2a ^ { 2 } - b ^ { 2 } is called a_______

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Factor out the GCF from the polynomial. - s(t2+11)−3(t2+11)s \left( t ^ { 2 } + 11 \right) - 3 \left( t ^ { 2 } + 11 \right)

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Solve. -  A triangle is 8 cm wider than it is tall. The area is 280 cm2. Find the width (length of the base). \text { A triangle is } 8 \mathrm {~cm} \text { wider than it is tall. The area is } 280 \mathrm {~cm} ^ { 2 } \text {. Find the width (length of the base). }  Solve. - \text { A triangle is } 8 \mathrm {~cm} \text { wider than it is tall. The area is } 280 \mathrm {~cm} ^ { 2 } \text {. Find the width (length of the base). }

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Fill in the blank with one of the words or phrases listed below. Not all choices will be used and some choices may be used more than once. factoring quadratic equation perfect square trinomial 0 greatest common factor hypotenuse sum of two cubes 1 difference of two cubes difference of two squares triangle leg -In a right triangle, the side opposite the right angle is called the ________

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Factor the polynomial completely. If the polynomial cannot be factored, write "prime." - 6t2+t−56 t ^ { 2 } + t - 5

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Factor the trinomial completely. If the polynomial cannot be factored, write "prime." - x2+x−56x ^ { 2 } + x - 56

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