Plz help me WILL GIVE BRAINLIEST

Mathematics

1 answer:

Luba_88 [7]3 years ago

4 0

Answer:

D 2x(3x+4) + 1(3x+4)

Step-by-step explanation:

(2x+1) (3x+4)

We need to FOIL

First 2x*3x = 6x^2

Outer 2x*4 = 8x

Inner 1*3x =3x

Last 1*4 =4

Add them together

6x^2 +8x+3x+4

Combine like terms

6x^2 +11x+4

This process is simply taking 2x (3x+4) and adding 1 (3x+4)

2x(3x+4) + 1(3x+4)

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Ernesto solves the equation below by first squaring both sides of the equation. \sqrt{\dfrac{1}{2}w+8}=-2 2 1 w+8 =−2square

algol [13]

Answer:

Step-by-step explanation:

Given the equation solved by Ernesto expressed as $\sqrt{\dfrac{1}{2}w+8}=-2$ , the extraneous solution obtained by Ernesto is shown below;

$\sqrt{\dfrac{1}{2}w+8}=-2\\\\square\ both \ sides \ of \ the \ equation\\(\sqrt{\dfrac{1}{2}w+8})^2=(-2)^2\\\\\dfrac{1}{2}w+8 = 4\\\\Subtract \ 8 \ from \ both \ sides\\\\\dfrac{1}{2}w+8 - 8= 4- 8\\\\\dfrac{1}{2}w= -4\\\\multiply \ both \ sides \ by \ 2\\\\\dfrac{1}{2}w*2= -4*2\\\\w = -8$