Use a suitable identity

$ (x+3)(x+3) $

Given:

$(x+3)(x+3)$

To do:

We have to solve the given expression using a suitable identity.

Solution:

We know that,

$(a+b)(a+b)=(a+b)^2$ and

$(a+b)^2=a^2+2ab+b^2$

Therefore,

$(x+3)(x+3)=(x+3)^2$

$(x+3)^2=x^2+2(x)(3)+3^2$

$=x^2+6x+9$.

Tutorialspoint

Updated on: 10-Oct-2022

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