Question

multiply (x+2)(x+5) using identity
plz tell fast​

Answer 1

$\underline{\huge \tt{ \red{A} \blue{n} {S} \green{w} \pink{E} \orange{r}}}$

$\\ \dagger \underline{\boxed{ \mathfrak{ \red{(x + a)(x + b) = {x}^{2} + (a + b)x + ab}}}}$

Here ,

• a = 2
• b = 5

(x + 2)(x + 5)

= x² + (2 + 5)x + (2 × 5)

= x² + 7x + 10

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 the data in question  (x+2)(x+5)  

We have find the value of given expression

We have use the identity

$(x+a)(x+b)=x^{2} +ax+bx+ab\\=x^{2} +(a+b)x+ab$

We know that ,

$(a+b)(a-b)=a^{2} -b^{2}$

Where, a=$2$ and $b=5$

now putting the value of given identity

$(x+2)(x+5)=x^{2} +(2+5)x+(2\times5)\\=x^{2}+7x+10$

Hence the required identity will be $(x+2)(x+5)=x^{2} +7x+10$.