Question

solve the following X²+3x-54=0

Answer 1

Answer:

$x = 6 \: \: \: \: \: \: or \: \: \: \: \: x = - 9.$

Step-by-step explanation:

${x}^{2} + 3x - 54 = 0 \\ \\ {x}^{2} + 9x - 6x - 54 = 0 \\ \\ x (x + 9) - 6(x + 9) = 0 \\ \\ (x - 6)(x + 9) = 0 \\ \\ x = 6 \: \: \: \: \: \: \: or \: \: \: \: \: \: \: x = - 9.$