Solve 5x – 2y = 11 for y.
1 answer:
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Other method:
zeros of numerator and denominator are x = -2 and x = 4.
Look at the second picture.
for x < -2 → x + 2 < 0 and x - 4 < 0
therefore
for -2 < x < 4 → x + 2 > 0 and x - 4 < 0
therefore
for x > 4 → x + 2 > 0 and x - 4 > 0
therefore
