Question

Solve the equation x²–7x–78=0

Answer 1

Step-by-step explanation:

${x}^{2} - 7x - 78 = 0 \\ \\ {x}^{2} - 13x + 6x - 78 \\ x(x - 13) + 6(x - 13) \\ (x - 13)(x + 6) \\ x = 13 \\ x = - 6$