What values are needed to make each expression a perfect square trinomial? x2 + 2x +_ x2 – 20x +_ x2 + 5x + ___

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What values are needed to make each expression a perfect square trinomial? x2 + 2x +___ x2 – 20x +___ x2 + 5x + ___

asked Sep 3, 2018 199k views

2 Answers

Dewyze · Answer 1 · 2018-09-10T15:03:12+0000

you need a number such that it = (half coefficient of x )^2

so for the first one: 1/2 * 2 = 1 , 1^2 = 1 So answer is 1

second: 1/2 * -20 = -10 , (-10)^2 = 100

third one 1/2 * 5 = 2.5 and 2.5^2 = 6.25

What values are needed to make each expression a perfect square trinomial? x2 + 2x +_ x2 – 20x +_ x2 + 5x + ___

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