12. What value/s of x make x2 + x - 12 = 0 true?
a. 1 and -2 b. 3 and -4
c. 5 and -6
d. -7 and 8
a. 1 and -2 b. 3 and -4
c. 5 and -6
d. -7 and 8
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Answer:
B. 3 and -4
Step-by-step explanation:
The factor of the given equation is (x+4) (x-3)
Thus in terms of value of x we have now
x=-4. ; x=3