Question

A2+b2=10, ab=3 find (a+b)(a-b)

Answer 1

Step-by-step explanation:

${a}^{2} +b^2=10 +2ab</p><p> \\ =10+6 =16</p><p> \\ (a+b)^2=4^2</p><p> \\ a+b=4 \\ similarly \\ using \: identity \\ \\ a - b = 2$

similarly

$(a + b)(a - b) = 4 \times 2 \\ \\ = 8$