X2 + 4x - 9 = 5x + 3 O A. 4 O B. -3 O C. -7 O D. 5 E. -2 F-4

asked Dec 21, 2022 213k views

25 votes

X2 + 4x - 9 = 5x + 3
O A. 4
O B. -3
O C. -7
O D. 5
E. -2
F-4

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4 votes

Answer:

${x}^(2) + 4x - 9 = 5x + 3 \\ {x }^(2) - x - 12 \\ {x}^(2) - 4x + 3x - 12 \\ x(x - 4) + 3(x - 4) \\ (x - 4)(x + 3) \\ x = 4 \: and - 3$

Naphstor answered Dec 26, 2022

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