Question

9a^2-3b+6ab is -3 when a=-2 find the value b




answer is this problem 13/5

Answer 1

$9 {a}^{2} - 3b + 6ab = - 3 \\ = > 36 - 3b - 12b= - 3 \\ = > - 3b \: - 12b = - 3 - 36 \\ = > - 15b = - 39 \\ = > b = \frac{ - 39}{ - 15 } \\ = > b = \frac{13}{5}$
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