Question

Find value of (105×109) without actually multiplying them. (please full explain). in class 8​​

Answer 1

Answer:

(105 × 109)

(11445)

Step-by-step explanation:

(105 × 109)

(11445)

Explanation : 105

×109

_________

945

000X

105XX

__________

11445

Answer 2

Answer:

(105)X(109)

=(100+5) X (100+9)

USING THE IDENTITY (x+a) (x+b)=+x^2 (a+b)x +ab , where x=100,a=5,b=9.

=(100)^2+(5+9) (100) +(5x 9)

=10000+(14) (100)+45

=10000+1400+45

=11445.

THEREFORE,11445 IS THE ANSWER.

AND PLEASE MAKE ME BRAINLIST....