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3 years ago

1. What is the factored form of 5x2 - 8x – 4?

Mathematics

2 answers:

Lelechka [254]3 years ago

8 0

Answer:

(5x + 2) (x - 2 )

Step-by-step explanation:

5x^2 - 8x – 4

(5x ) (x )

We need the middle to be -8 and 4 factors into 4*1 and 2*2

5*2 = 10 -2 = 8

(5x 2) (x 2 )

Now determine the signs

We need -8 so 5*2 must be negative and the 2*1 must be positive

(5x + 2) (x - 2 )

Kobotan [32]3 years ago

4 0

$\boxed{\large{\bold{\textbf{\textsf{{\color{gold}{Answer \red{:)}}}}}}}}$

$\implies 5x^2-8x-4\\\\\implies 5x^2-10x+2x-4\\\\\implies 5x(x-2)+2(x-2)\\\\\dashrightarrow (x-2)(5x+2)$

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