Question

x² + 10x + 21 plz solve it

Answer 1

Answer:

x² + 10x + 21

= x² + 7x + 3x + 21 = x(x+7) + 3 (x+7)

= (x+3)(x+7)

Step-by-step explanation:

HOPE IT HELPS YOU MATE (灬º‿º灬)♡

Answer 2

${x}^{2} + 10x + 21 \\ \ {x}^{2} + 7x + 3x + 21 \\ x(x + 7) + 3(x + 7) \\ (x + 7)(x + 3) \\ x = - 7 \: and \: x = - 3$