Question

.Which of the following are the roots of the quadratic equation, x² – 9x + 20 = 0 by factorisation? *​

Answer 1

$= > {x}^{2} - 9x + 20 = 0 \\ = > {x}^{2} - (5 + 4)x + 20 = 0 \\ > {x}^{2} - 5x - 4x + 20 = 0 \\ = > x(x - 5) - 4(x - 5) = 0 \\ = > (x - 5)(x - 4) = 0 \\ = > x = 5 \: or \: x = 4$

Answer 2

Answer:

5,4

Step-by-step explanation:

x² – 9x + 20 = 0

x² – 5x-4x + 20 = 0

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

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

x=4,5

THANK YOU!!!!