Question

If a – b = 3 and ab = 10 find a + b.

Answer 1

Answer:

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

=>(3)^2= a^2+b^2-2(10)

=>9+20=a^2+b^2

=>29=a^2+b^2

=>a^2+b^2=29

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

=29+2(10)=29+20=49

a+b=√49

= 7

Answer 2

Step-by-step explanation:

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