****-2x^2(-5x^2+4x^3) in standard form?

2 answers:

nataly862011 [7]3 years ago

8 0

$-2 x^{2} (-5 x^{2} +4 x^{3} )$ Use distributive property

$-2 x^{2} (-5 x^{2}) +-2 x^{2} (4 x^{3} )$

$10 x^{2+2} +-8 x^{2+3}$

$10 x^{4}+ -8 x^{5}$

$-8 x^{5}+ 10 x^{4}$ <-answer

Lyrx [107]3 years ago

3 0

-2x^2(-5x^2+4x^3)=10x^4-8x^5

You might be interested in

Amir can run 151515 kilometers in one hour. How many kilometers can Amir run per minute?

DIA [1.3K]

There is no way that he can run 151515km/h, but if he really can, then :

1 hour = 60 minutes

(151515km/h)/60minutes = 2525,25km/minute

8 0

3 years ago

How to solve equations with the substitution method

Paul [167]

Answer:

In a system, the substitution method is one of the 3 main ways to solve a system and can be very efficient at times.

Skills needed: Systems, Algebra

Step-by-step explanation:

1) Let's say we are given two equations below:

$y=4x \\ 4x-5y=-32$

We can use substitution here by substituting in for $y$ in the second equation. This means we put in $4x$ for $y$ in the 2nd equation so we only have $x$ variables in the equation, allowing us to solve for $x$ .

2) Solving it out:

$1) 4x-5(4x)=-32 \\ 2) 4x-20x=-32 \\3) -16x=-32 \\4)x=2\\5)y=4x = 4(2) = 8 \\ 6)y=8$

We essentially substitute in that value as seen in step 1. Steps 2 and 3 are just simplifying the left side and allowing for us to solve. Step 4 is where we divide by -16 on both sides to solve for x. Step 5 and 6 show us solving for y using the value for x. We get $x=2,y=8$