please answer as soon as possible
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Step-by-step explanation:
x+15=(x+3)²
x+15=x²+9+6x
x²+5x-6=0
x²+6x-x-6=0
x(x+6)-1(x+6)=0
(x-1)(x+6)=0
x=1 or -6
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0
Answer:
Please follow me and mark brainlist
Step-by-step explanation:
-6
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