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jacobrios15:
Select the quadratic expression that represents the product below. a--8x2 - 6x + 35 b--8x2 + 6x - 35 c--8x2 - 34x + 35 d--8x2 + 34x - 35
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dude:
Where is the given equation?
jacobrios15:
it is (2x+5)(7-4x)
Angle:
OK bare with me, answer a few easy question I throw your way and we can get to your answer easily first (2x)*(7) so what is 2 times 7?
jacobrios15:
14
Angle:
awesome next (2x)*(4x) so what is 2 times 4?
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jacobrios15:
8
Angle:
amazing! next is the middle ones (5)*(7) so what is 5 times 7?
jacobrios15:
35
Angle:
perfect! and finally the last two numbers (5)*(-4x) so what is 5 times Negative 4?
jacobrios15:
i think -20
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Angle:
wonderful! that's right :) so, (14)x - (8)x^2 + 35 - (20)x can be reorganized and simplified to: -8x^2 - 6x + 35
jacobrios15:
thank you:)
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