What is the solution of StartRoot x + 12 EndRoot = x?
2 answers:
Answer:
B) x=4
Step-by-step explanation:
I just got a 100% on the unit test from EDGE.
Answer:
x = 4 or x = -3
Step-by-step explanation:
Take square both the sides,
x² - x - 12 = 0
x² - 4x + 3x - 3*4 =0
x*(x - 4) + 3*(x - 4)= 0
(x- 4 )(x+3) =0
x -4 =0 or x + 3 = 0
x = 4 or x = -3
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