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Alexandra [31]
3 years ago
15

Can you please help me with 7,8, and 9 :)

Mathematics
1 answer:
Nadusha1986 [10]3 years ago
5 0
x^2+7x=-12\\x^2+7x+12=0\\x^2+3x+4x+12=0\\x(x+3)+4(x+3)=0\\(x+4)(x+3)=0\\x=-4\ and \ x=-3
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