Question

(ii) (4.912
quicker than the
1013. 100
direct multiplication method.
Example 12: Using Identity (II), find (i) (4p - 3g)2
Solution:
(1) (4p - 39)2 =(4p)-2 (4p) (39) + (39) [Using the Identity (ID)
= 16p2 - 24pq +9q?
Do you agree that for squaring (4p-39)-the method of identities:
direct method?
(i) (4.9)2 =(5.0 -0.1)? = (5.0)2 - 2 (5.0) (0.1) + (0.1)2
= 25.00 - 1.00 + 0.01 = 24.01
Is it not that, squaring 4.9 using Identity (II) is much less tedious th
direct multiplication?
tamnle 13. I sing Identity (III), find
ious than squaring it by​

Answer 1

There are four properties involving multiplication that will help make problems easier to solve. They are the commutative, associative, multiplicative identity and distributive properties. Multiplicative Identity Property: The product of any number and one is that number. For example 5 * 1 = 5.