Question

if a-b=5 and ab=5 then the value of a^2+b^2=____​

Answer 1

Answer:

$a^{2} + b^{2} = 30$

Step-by-step explanation:

we know that $(a-b)^{2} = a^{2} + b^{2} - ab$

substitute the given values in the above equation.

$5^{2} = a^{2} + b^{2} - 5$

25 + 5 = $a^{2} + b^{2}$

∴ $a^{2} + b^{2}$ = 30

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