90.6k views
5 votes
3x(3x-1)-(3x+5)(3x-5)=3x+25

User Elderry
by
6.9k points

2 Answers

3 votes

Answer:

x=0

Explanation:


3x(3x-1)-(3x+5)(3x-5)=3x+25\\\\\text{Use the algebraic identity,}(a+b)(a-b)=a^2-b^2\\9x^2-3x-(9x^2-25)=3x+25\\9x^2-3x-9x^2+25=3x+25\\-3x=3x\\-6x=0\\x=0

User Rahul Khengare
by
7.7k points
5 votes

Answer:


\sf x=0

Explanation:


\sf 3x\left(3x-1\right)-\left(3x+5\right)\left(3x-5\right)=3x+25


\sf -3x+25=3x+25


\sf -3x+25-25=3x+25-25


\sf -3x=3x


\sf -3x-3x=3x-3x


\sf -6x=0


\sf (-6x)/(-6)=(0)/(-6)


\sf x=0

User Luck
by
6.0k points
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