2a-3b=5 then find the value of 8a^3-27b^3-125
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Answer:
Give:
2a=3b-5
And the given expression is
8a^3-27b^3+90ab+125
Which can also be written as
(2a)^3 -27b^3 +45b(2a)+125
Substituting the vale of 2a
(3b-5)^3-27b^3+45b(3b-5)+125 /
= 27b^3 -135b^2+225b-125-27b^3 +135b^2 -225b+125 \
=0
Step-by-step explanation:
Answer:
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