4. Simplify the following using p - q? = (p+q)(p – 9):
(b) 65 x 55
(a) 38^2-12^2
(c) 43^2 – 17^2
Answers
Answered by
3
Step-by-step explanation:
65×55= 3575
b. 38² –12² = 1444–144 = 1300
c. 43²–17² = 1849–289 = 1560
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Answered by
4
Answer:
may I
Step-by-step explanation:
(b) 65×55
(60+5) × (60-5)
identity used (p+q)(p-q) = p^2-q^2
60^2-5^2
3600-25
3575answer....
(a) 38^2-12^2
identity used is p^2-q^2=(p+q)(p-q)
(38+12)(38-12)
50×26
1300answer.....
(c) 43^2-17^2
identity used is p^2-q^2=(p+q)(p-q)
(43+17)(43-17)
50×26
1300answer.......
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