Q2 of 90 Page 33

Find the products using the algebraic identities.

94 x 97

94 x 97 = (100 – 6)(100 – 3)

Using identity –


(x – a)(x – b) = x2 – (a + b)x + ab, we get -


Take 94 = 100 – 6 and 97 = 100 – 3


94 x 97 = 1002 – (6 + 3)100 + 6× 3


= 10000 – 900 + 18


= 9118


More from this chapter

All 90 →
1

Using suitable identities find the products.

(x + 2) (x – 5)

 2

Find the products using the algebraic identities.

104 x 109

 2

Find the products using the algebraic identities.

103 x 97

 3

Factorize using appropriate identities.

x2 + 6xy + 9y2