(x + 3)^2- 144 I have to factor it

Jianhong asked Feb 12, 2023

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30 votes

(x + 3)^2- 144

I have to factor it

Jianhong asked Feb 12, 2023

2.7k points

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17 votes

Answer:

X=-15

X=9

Explanation:

I think this is how you do it

$(x + 3)(x + 3) - 144 \\ {x}^(2) + 3x + 3x + 9 - 144 \\ {x}^(2) + 6x - 135 \\$

From there it's a regular quadratic

${x}^(2) - 9x + 15x - 135 \\ x(x - 9) + 15(x - 9) \\( x + 15)(x - 9) \\ x = - 15 \\ x = 9$

Qnku answered Feb 18, 2023

by Qnku

2.4k points

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