7. If a + b = 10 and a – b = 2, find the value of 2a^2+ 2b^2?
Answer:
80
Step-by-step explanation:
a+b= 10
a-b=2
a^2 -b^2 = (a+b) (a-b)
2(10) 2(2)
20×4
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Answer:
80
Step-by-step explanation:
a+b= 10
a-b=2
a^2 -b^2 = (a+b) (a-b)
2(10) 2(2)
20×4
80