Question

a+b=7;ab=12 then find 3(a
2-ab+b2)​

Answer 1

Answer:

39

Step-by-step explanation:

we havea+b=7;ab=12

b=7-a

a(7-a)=12

7a-a^2=12

a^2-7a+12=0

a=3 or 4

if a =3,b=4

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

3(9-12+16)

3(13)=39

hope it helps

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