Algebraic Identity: (x + a)(x + b) = x^2 + (a + b)x + ab

Q. Find the value of $493\times 504$, using a suitable identity.

1. 248500
2. 248528
3. 248472
4. 248448

Q. The value of 56 $\times$ 54 is .

1. 3124
2. 2924
3. 2944
4. 3024

Q. Using suitable identity, evaluate $136\times 107$

1. 14552

Q. $(y+8)(y+6)$ = .

1. $(2y^2+7y+48)$
2. $(y^2+14y+48)$
3. $(y^2+7y+24)$
4. $(y^2+14y+24)$

Q.

Which of the following is equal to $(x+2)(x+3)?$

1. $x^2+5x+6$

2. $x^2+3x+6$

3. $x^2+4x+6$

4. $x^2+2x+6$

Q.

Find the value of each of the following:

$\left(7909\times 98\right)+\left(7909\times 2\right)$

Q. Find value of $54\times 46$ using identity.

Q. By using identity.
${\left(799\right)}^2=?$

Q.

Find the product of $(2a^2+9)(2a^2+5).$