Question

x=2/3 and x=-3 the find the value of a and b in ax^2+7x+b

Answer 1

Answer:

A=3,b=-6

Step-by-step explanation:

Hope helps u.

See the attachment below for ur answer

Answer 2

Answer:

a(2/3)²+7(2/3)+b

4a/9+14/3+b=0

multiply by 9

4a+42+9b=0

4a+9b=-42......(1)

a(-3)²+7(-3)+b=0

9a-21+b=0

9a+b=21

multiply by 9

81a+9b=189......(2)

solve (1) and (2)

77a=231

a=3

9(3)+b=21

27+b=21

b=-6

hope it helps you

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