a-b=7 and a2+b2=85,find a3=b3
BrainlyQueen01:
is it a³ - b³
yes sry for the mistake
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Answered by
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here's your answer dude.
a-b=7.........(1)
2a+2b=85......(2)
eq(1)×2 we get..
2a-2b=14......(3)
eq(2)+(3) we get.
4a-0=99
a=24.75
substituting a=24.75 in (3)
2×24.75-2b=14
-2b= -49.5
2b = 49.5
b=24.75
3a=3b
3×24.75=3×24.75
74.25=74.25
therefore3a=3b
plz mark as brainliest
a-b=7.........(1)
2a+2b=85......(2)
eq(1)×2 we get..
2a-2b=14......(3)
eq(2)+(3) we get.
4a-0=99
a=24.75
substituting a=24.75 in (3)
2×24.75-2b=14
-2b= -49.5
2b = 49.5
b=24.75
3a=3b
3×24.75=3×24.75
74.25=74.25
therefore3a=3b
plz mark as brainliest
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