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tatuchka [14]
3 years ago
6

Which of the following are solutions to the equation below? Check all that apply. 4x2 + 4x + 1 = 9​

Mathematics
1 answer:
Vilka [71]3 years ago
4 0

Answer:

4x^2 + 4x + 1=9

4x^2 + 4x - 8=0

Dividing both sides by 4

x^2 + x -2=0

It can be written as

x^2 + 2x - x - 2=0

x(x+2) -1(x+2)=0

taking (x+2) as common on LHS

Then, (x+2)(x-1)=0

Now first equate x+2=0  ie x=-2

then                 x-1=0 ie x=1

Therefore, x has two values(roots)

that is -2,1

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<h3><u>a.</u>)</h3>

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