Question

please answer this experts !
this is the last question
please answer

Answer 1

Answer:

x²+9x+20= x²+4x+5x+20

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

=(x+4)(x+5)

x²+13x+40=x²+8x+5x+40

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

=(x+8)(x+5)

3x²-21x+36=3x²-9x-12x+36

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

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

=3(x-4)(x-3)

5x²-41x+8=5x²-x-40x+8

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

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