A-b=7 and ab=18 find : a+b
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Answered by
1
Answer:
a = 9 ,b=2 ,9-2 = 7, 9×2=18,9+2=11
Answered by
0
Step-by-step explanation:
a-b=7
a=b+7 (1)
ab=18
from1
b(b+7)=18
b^2+7b=18
b^2+7b-18=0
b^2+9b-2b-18=0
b(b+9)-2(b+9)
b=-9 or b=2
a=16ora=9
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