Question

the sum of the numbers a and b is 9 and there product is 20, find a square- ab+b square​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

21

Step-by-step explanation:

a+b=9(equation 1)

a*b=20(equation 2)

b=20/a(substitute in equation 1)

a+20/a=9

a^2+20=9a

a^2-9a+20=0

a^2-4a-5a+20=0

a(a-4)-5(a-4)=0

(a-5)(a-4)=0

a=5,4

a=5(substitute in equation 2)

(5)*b=20

b=20/5=4

given equation

a^2-ab+b^2

(5)^2-(5)(4)+(4)^2

25-20+16

41-20=

21