Question

Find the factors of A and B of x² + 10x+ 21 in form of AB.With explanation​

Answer 1

Answer:

x² + 10x+ 21  

or, x ^2 + 7x +3x +21

or, x ( x +7 ) +3 ( x+7)

or, (x+7)(x+3)

Answer 2

Step-by-step explanation:

x^+10x+21

(x^+3x)+(7x+21)

x(x+3)7(x+3)

(x+7)(x+3)

A=(x+7)=0

x=-7

B=(x+3)=0

x=-3

AB=-7(-3)

=21