if a + b = 7 and ab = 10 find the value of ( a^2 + b^2)
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Step-by-step explanation:
(a+b)^2 = a^2+2ab+b^2
therefore , a^2+b^2 = (a+b)^2 - 2ab (i)
we have given that ; a+b =7 and ab = 10
Applying these values in (i)
therefore , a^2+ b^2 = (7)^2 - 2(10)
= 49-20
= 29
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