Question

• What should be added to 1+2x-3x² to get x²-x-1 ?​

Answer 1

Step-by-step explanation:

$2x²-3x-2$

Hope this helps u

Answer 2

Solve 2x = 5

The variable is the letter on the left-hand side (LHS) of the equation. The variable is multiplied by two.

I want the x to stand alone on one side of the equation. Since the x is multiplied by 2, I need to divide on both sides by 2, in order to get the variable by itself. This is called "dividing through by 2", and it looks like this:

\small{ 2x = 5 }2x=5

\small{ \dfrac{(2x)}{2} = \dfrac{(5)}{2} }

2

(2x)

=

2

(5)

\small{ x = \dfrac{5}{2} }x=

2

5

Then the solution is:

\mathbf{\color{purple}{ \small{ \mathit{x} = \dfrac{5}{2} } }}x=

2

5

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