Question

(x+a) (y+a)=xy+(x+y)a+a2 using this find 13×23​

Answer 1

$\Huge\bf\maltese{\underline{\green{Answer}}}\maltese$

$\large\bf{\underline{\red{GIVEN:-}}}$

~ (x+a) (y+a)=xy+(x+y)a+a²

~ & 13×23.

$\large\bf{\underline{\red{TO\: FIND:-}}}$

(x+a) (y+a)=xy+(x+y)a+a² using this find 13×23.

$\large\bf{\underline{\red{SOLUTION:-}}}$

13 × 23 Can also be Written as,

=> ( 3 + 10 )( 13 + 10 )

By the Formula,

(x+a) (y+a) = xy+(x+y)a+a²

(3+10)(13+10) = 3×13+(3+13)10+10²

= 39+(16)10+100

= 39+(16)110

= 39 + 1,760

= 1,799.

• I Hope it's Helpful My Friend.