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3 years ago

15

X^2+8x+c Perfect square Trinomial

1 answer:

Anit [1.1K]3 years ago

4 0

We know <span>square of the sum <span>formula</span></span>
(a+b)²=a²+2ab+b²
so we need
x²+8x+c=(x²+2*4*x+4²)-16+c=(x+4)²+c-16,
so for full square we need c-16=0
c=16
Answer: c=16

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Step-by-step explanation:

we know that

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