Question

5. Expand using identity: (x + 7)²​

Answer 1

Answer:

$\displaystyle \sf \red{(x + 7 {)}^{2} }$

Using ( a+b)² = a² + 2ab + b² to expand the expression.

$\sf \red{ {x}^{2} + 2x \times 7 + {7}^{2} }$

$\boxed{ \sf\red{ {x}^{2} + 14x + 49}}$

Answer 2

In accordance with the information provided in the question,

We have find the value of the supplied expression in the above question.

Given data in question  (x + 7)²

We know that the mathematical  formula used to be $(a+b)^{2} =a^{2} +2ab+b^{2}$

We have find the value of given expression and putting the value of formula

Hence we get ,

$(X+7)^{2} =X^{2} +2*X*7+7^{2} \\(X+7)^{2} =X^{2} +14X+49$

Hence the required result will be $(X+7)^{2} =X^{2} +14X+49$.