If a-b=4, ab=45 find value of a cube- b cube.
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Given,
a-b=4
Ab=45
Step 1:
(A-b)²=a²+b²-2ab
Putting value
4²=a²+b²-2×45
16=a²+b²-90
16+90=a²+b²
106=a²+b²
Step 2:
A³-b³=(a-b)(a²-ab+b²)
Putting value
A³-b³=4(106-45)
A³-b³=4×61
A³-b³=244
(ANSWER)
#Mark as the Branliest
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Team Kancha
a-b=4
Ab=45
Step 1:
(A-b)²=a²+b²-2ab
Putting value
4²=a²+b²-2×45
16=a²+b²-90
16+90=a²+b²
106=a²+b²
Step 2:
A³-b³=(a-b)(a²-ab+b²)
Putting value
A³-b³=4(106-45)
A³-b³=4×61
A³-b³=244
(ANSWER)
#Mark as the Branliest
Regards
Team Kancha
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