Question

use expansion formula find value 35 x 45

Answer 1

Hey mate...... Here is the correct answer :

40-5 * 40 +5

40^2 - 5^2

1600 - 25

1575

I hope that it was helpful to you.............

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Answer 2

yaa I can do it hope you like it

we can write it as

(40-5) (40+5)

and now we know the identity

(a+b)(a-b)=a^2-b^2 or

a square minus b square

=(40)^2-(5)^2

= 1600-25

=1575

thank you dude