Question

o 1 solve by
(x²+x-20=0
completing square method​

Answer 1

Answer:

${x}^{2} + x - 20 = 0 \\ {x}^{2} + 5x - 4x - 20 = 0 \\ x(x + 5) - 4(x + 5) = 0 \\ (x - 4)(x + 5) = 0$

either,

x = 4 and x = -5

hope it's help u