Question

Solving quadratic equations by using quadratic formula

x² -3x - 18 = 0


Plss show me the solution

Answer 1

Answer:

${x}^{2} - 3x - 18 = 0 \\ \\ = > {x}^{2} - (6 - 3)x - 18 = 0 \\ \\ = > {x}^{2} - 6x + 3x - 18 = 0 \\ \\ = > x(x - 6) + 3(x - 6) = 0 \\ \\ = > (x - 6)(x + 3) = 0 \\ \\ either \: x - 6 = 0 \\ \\ = > x = 6 \\ \\ or \: x + 3 = 0 \\ \\ = > x = - 3$

✏ solved ✔