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Sagot :
Answer:
- C. { - 1, 2}
Step-by-step explanation:
The first two steps solved and the last step to be performed
Solve the quadratic equation
- x² - 3x + 12 = - 2x + 14
- x² - 3x + 2x + 12 - 14 = 0
- x² - x - 2 = 0
- x² - 2x + x - 2 = 0
- x(x - 2) + (x - 2) = 0
- (x - 2)(x + 1) = 0
- x - 2 = 0 ⇒ x = 2
- x + 1 = 0 ⇒ x = - 1
The solution is:
- { - 1, 2}
Correct choice is C
Solving from step 3
- -2x+14=x²-3x+12
- x²-3x+2x-2=0
- x²-x-2=0
- (x-2)(x+1)=0
- x=2 or -1
Option C
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