Question

Xpower of 2- X-20 = please find​

Answer 1

${x}^{2} - x - 20$

${x}^{2} - (5 - 4)x - 20$

${x}^{2} - 5x + 4x - 20$

$x(x - 5) + 4(x - 5)$

$(x - 5)(x + 4)$

Answer 2

Answer:

x = -4 or 5

Step-by-step explanation:

• x²-x-20 = 0
• Multiply coefficient of x² with constant
• 1*20 = 20
• Find factors of 20 such that their sum is -x
• x²+4x-5x-20 = 0
• X(X+4)-5(X+4)
• (X+4)(x-5) = 0
• X = -4 or 5