find the product of following using properties of squares? (a) 13 x 15 ( b ) 28 x 30 (c) 53 x 55. (d) 100 x 102. please don't post irrevelent answers .❤️❤️❤️❤️❤️❤️❤️❤️❤️
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Answered by
17
Step-by-step explanation:
a) 13×15
(14-1) ×(14+1) {(a-b) (a+b) = a²- b²}
14² - 1²
196-1
195
Similarly you can solve the rest of the questions
Answered by
2
Step-by-step explanation:
28*30
(a+b)² (a-b) ² = a² -b²
(29+1)² (29-1)²
= 29² - 1²
= 841 - 1
= 840
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