Question

factorise x^2+21x+9​

Answer 1

Answer:

(x+6)(x+15)

Step-by-step explanation:

x^2+6x+15x+90

=x(x+6)+15(x+6)

=(x+6)(x+15) ( @ns..)

Answer 2

Answer :-

$\mathsf{➡{x}^{2}+21x + 9}$

$\mathsf{➡x(x + 6) + 15(x + 6)}$

$\mathsf{➡(x + 15)(x + 16)}$

$\large\purple{\boxed{\sf{Answer=(x + 15)(x + 16)}}}$

Hope it helps..

Keep smiling..☺

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