Simplify - 5a^2(a^2+3a+2)-2a^3(a+4)-5a(3a+4) Evaluate it for a=1
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1
Answer:
(3ab−2a
2
+5b
2
)×(2b
2
−5ab+3a
2
)+8a
3
b−7b
4
=3ab(2b
2
−5ab+3a
2
)−2a
2
(2b
2
−5ab+3a
2
)+5b
2
(2b
2
−5ab+3a
2
)+8a
3
b−7b
4
=6ab
32
−15a
2
b
2
+9a
3
b−4a
2
b
2
+10a
3
b−6a
4
+10b
4
−25ab
3
+15a
2
b
2
+8a
3
b−7b
4
=27a
3
b−4a
2
b
2
−19ab
3
−6a
4
+3b
4
Putting, a = 1, and b = (-1)
=27(1)
3
(−1)−4(1)
2
(−1)
2
−19(1)(−1)
3
−6(1)
4
+3(−1)
4
=−27−4+19−6+3
=−37+22
=−15
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