Question

please answer this experts

Answer 1

Step-by-step explanation:

2.x^2+9x+20

x^2+4x+5x+20

x(x+4)+5(x+4)

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

x=-4,-5

3.x^2+13x+40

x^2+5x+8x+40

x(x+5)+8(x+5)

(x+5)(x+8)=0

x=-5,-8

4.3x^2-21x+36

3x^2-9x-12x+36

3x(x-3)-12(x-3)

(3x-12)+(x-3) =0

x=12/3,3

x=4,3

5.5x^2-41x+8

5x^2-40x-x+8

5x(x-8)-x(x-8)

(5x-1)(x-8) =0

x=1/5,8