Question

5a²-22a-15=0
how to solve it​

Answer 1

Answer:

$5 {a}^{2} - 22a - 15 = 0 \\ \\ = > 5 {a}^{2} - 25a + 3a - 15 = 0 \\ \\ = > 5a(a - 5) + 3(a - 5) = 0 \\ \\ = > (5a + 3) \times (a - 5) = 0 \\ \\ = > (5a + 3) = 0 \: \: or \: \:( a - 5) = 0 \\ \\ = > a = \frac{ - 3}{5} \: \: o r \: \: a = 5$

Answer 2

Answer:

$\begin{lgathered}5 {a}^{2} - 22a - 15 = 0 \\ \\ = > 5 {a}^{2} - 25a + 3a - 15 = 0 \\ \\ = > 5a(a - 5) + 3(a - 5) = 0 \\ \\ = > (5a + 3) \times (a - 5) = 0 \\ \\ = > (5a + 3) = 0 \: \: or \: \:( a - 5) = 0 \\ \\ = > a = \frac{ - 3}{5} \: \: o r \: \: a = 5\end{lgathered}$