If a+b=7 and ab = 10; find (a^2-b^2)
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Answer:
a^2 -b^2
= 5^2 -2^2
= 25 - 4
= 21
Step-by-step explanation:
a+b = 7. 5+2 = 7
ab = 10. 5×2 = 10
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