Question

( x+5) (x+2) Use suitable identities

Answer 1

Answer:

(x+5) (x+2)

as we know (x+a) (x+b)= x² +(a+b)x + ab

x² +(5+2)x + 5×2

x²+7x+10

I hope it helps u

Answer 2

Answer:

$\huge\blue{\boxed{\sf AnSWeR }}$

We know that

(x+a)(x+b)=x²+(a+b)x+a×b

and

(x+5)(x+2)

x²+(5+2)x+5×2

$\huge\red{\boxed{\sf x²+7x+10✔︎ }}$

$\huge\orange{\boxed{\sf Some\:usefull\: identities }}$

→ (a + b)² = a² + 2ab + b²

→ (a – b)² = a² – 2ab + b²

→a² – b²= (a + b)(a – b)

→ (x + a)(x + b) = x² + (a + b) x + ab

→ (a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca

→(a + b)³= a³+ b³+ 3ab (a + b)

→ (a – b)³ = a³– b³ – 3ab (a – b)

→ a³+ b³ + c³ – 3abc = (a + b + c)(a²+ b² + c² – ab – bc – ca)