x = -3 or -5
x = -3 or 5
x = 3 or -5
x = 3 or 5
Correct answer is C
f:x → 2x2 + 3x -7 and
g:x →5x2 + 7x - 6
If 3f(x) = g(x)
3(2x2 + 3x -7) = 5x2 + 7x - 6
6x2 + 9x - 21 = 5x2 + 7x - 6
6x2 - 5x2 + 9x - 7x - 21 + 6
x2 + 2x - 15 = 0
x = 3 or -5
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