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love history [14]
3 years ago
8

X² + x = 12show the steps please​

Mathematics
2 answers:
Anna35 [415]3 years ago
8 0

Answer:

x1 = -4

x2 = 3

Step-by-step explanation:

x^{2} + x = 12\\x^{2} +x-12=0\\x^{2} +4x-3x-12=0\\x*(x+4)-3(x+4)=0\\(x+4)*(x-3)=0\\x+4= 0  \\x-3=0\\x=-4 \\x=3\\x1=-4 \\x2=3

malfutka [58]3 years ago
3 0

Step-by-step explanation:

=> x² + x = 12

=> x² + x -12 = 0

=> x² + 4x - 3x -12 = 0

=> x ( x + 4)-3(x + 4) = 0

=> ( x + 4)(x-3)=0

=> x = 3 , -4

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