Question

Factorise the following quadric equation.
x² + x - 20 = 0​

Answer 1

x² + x - 20 = 0

x² + 5x-4x - 20 = 0

x (x+5)-4 (x+5)=0

(x-4)(x+5)=0

which is desired Factorisation

Roots of equation => x=4,-5