(2 x +7)^2 - (2x - 7) ^2 simplify by using identities
Answers
Answered by
1
Answer:
(
2
x
+
7
)
(
2
x
−
7
)
=
0
I hope this is correct answer
Answered by
1
Answer:
56x
Step-by-step explanation:
since, (a+b)²=a²+b²+2ab
→(2x+7)² = (2x)²+(7)²+2(2x)(7)
= 4x²+49+28x
since, (a-b)²=a²+b²-2ab
→(2x-7)² = (2x)²+(7)²-2(2x)(7)
= 4x²+49-28x
→(2x+7)²-(2x-7)²=(4x²+49+28x)-(4x²+49-28x)
=4x²+49+28x-4x²-49+28x
=56x
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