please solve this problem question 3
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bansalharsh2504:
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Answer:hope it would help u.
Check the attachment.
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In these type of question was try to avoid more calculations and try taking common is each possible case:-
3)a)
2a^2+ab
=a(2a+b).......................(now lets put the values)
=2(2x2+3)
=2(4+3)
=2x7
=14
b)
x^3 - y^3 + z^3
=2^3 - (-3)^3 + (-2)^3
=8 - (-27) + (-8)
=8 + 27 -8
= 27
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