o
$. If a - b = 0.9 and ab = 0.36; find :
(i) a + b
(ii) a- - 62.
Answers
Answered by
2
Step-by-step explanation:
Q)) a-b=0.9
ab=0.36
(1)
As we know that ,
(A-B) ²=(A+B)²-4(AB)
(0.9)²=(A+B)²-4(0.36)
0.81=(A+B)²-1.44
0.81-(A+B)²+1.44=0
(A+B)²=1.44+0.81
(A+B)²=2.25
(A+B)=±1.5
a+b=1.5
(2) a-(-62)
a+62
a+b=1.5
a-b=9
2a=10.5
a=5.25
put the value in this equation
a-(-62)=a+62=5.25+62=67.25
Answered by
1
Answer:
As we know that ,
(A-B) ²=(A+B)²-4(AB)
(0.9)²=(A+B)²-4(0.36)
0.81=(A+B)²-1.44
0.81-(A+B)²+1.44=0
(A+B)²=1.44+0.81
(A+B)²=2.25
(A+B)=±1.5
a+b=1.5
(2) a-(-62)
a+62
a+b=1.5
a-b=9
2a=10.5
a=5.25
put the value in this equation
a-(-62)=a+62=5.25+62=67.25
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