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4 votes
4 votes
(2x - 3)(2x + 1) + 35 = 4x (x-5)

User Jujhar Singh
by
2.7k points

2 Answers

10 votes
10 votes

Answer:


x=-2

Explanation:

Use the distributive property,
a(b+c)=ab+ac


(2x - 3)(2x + 1) + 35 = 4x (x-5)\\(2x - 3)(2x + 1) + 35 = (4x)(x)-(4x)(5)\\(2x - 3)(2x + 1) + 35 = 4x^2-20x

Use the concept of FOIL (First Outer Inner Last ),
(a+b)(c+d)=ac+ad+bc+bd


(2x)(2x)+(2x)(1)-(3)(2x)-(3)(1) + 35 = 4x^2-20x\\4x^2+2x-6x-3 + 35 = 4x^2-20x\\-4x+32 = -20x\\-4x+20x=-32\\16x=-32\\x=(-32)/(16)\\x=-2

User Art Shayderov
by
3.2k points
12 votes
12 votes
x= -2 would be your answer I think
User Oxidworks
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3.1k points