Q1 of 59 Page 162

The product 58 × 62 is

58× 62 = (60-2)× (60 + 2)


We use the form (a + b)(a-b) = a2 - b2


⇒ 58× 62 = 602-22


⇒ 58× 62 = 3600-4 = 3596


So C is the correct option.

More from this chapter

All 59 →
1

The value of (7.2)2 is (use an identity to expand)

 1

The expansion of (2x – 3y)2 is:

 2

Take away 8x – 7y – 8p + 10q from 10x + 10y – 7p + 9q.

 3

Expand:

(i) (4x + 3)2


(ii) (x + 2y)2


(iii)


(iv)