Question

slove quadratic equation by square method x2 +x-20=0​

Answer 1

$\huge\mathrm\red{Answer}$

${x}^{2} + x - 2 = 0$

by middle term splitting

${x}^{2} + 2x - x - 2 = 0$

$x(x + 2) - 1(x + 2)$

$(x + 2)(x - 1)$

there the zeros of the polynomial are:

$x = - 2 \\ x = 1$

Answer 2

Answer:4 OR -5

Step-by-step explanation:

X2+5X-4X-20=0

(X2+5X)(-4X-20)=0

X(X+5) -4(X+5)

(X-4)(X+5)

=>X= 4 OR -5