3) Simplify and then evaluate for a = (-2). a? (a? - 2a + 3) - 5.
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Answered by
0
Answer:
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Step-by-step explanation:
(2a+3)(2a−3)(4a2+9) =[(2a)2−(3)2](4a2+9) [∵(a+b)(a−b)=a2−b2]
=(4a2−9)(4a2+9)
=(4a2)2−(9)2=16a4−81
Answered by
0
Step-by-step explanation:
(2a+3)(2a−3)(4a
2
+9) =[(2a)
2
−(3)
2
](4a
2
+9) [∵(a+b)(a−b)=a
2
−b
2
]
=(4a
2
−9)(4a
2
+9)
=(4a
2
)
2
−(9)
2
=16a
4
−81
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