Question

LY) - Y) TY).
6. If a^2 + b^2 = 13 and ab = 6, find (i) a + b (ii) a - b.
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Answer 1

i) (a+b)^2=a^2+b^2+2ab

(a+b)^2=13+2(6)

(a+b)^2=25

(a+b)=√25

a+b=5

ii) (a-b)^2=a^2+b^2-2ab

(a-b)^2=13-2(6)

(a-b)^2=13-12

(a-b)^2=1

(a-b)=1

Answer 2

Step-by-step explanation:

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