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makkiz [27]
3 years ago
10

How do you simplify this expression then evaluate it if x=2? 5x - 2 + 3 - x

Mathematics
1 answer:
DIA [1.3K]3 years ago
7 0

You just put all of the like terms together, if it has an X combine it and if it doesn't have an X combine it. You end up with 4x-5

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When deriving the quadratic formula by completing the square, what expression can be added to both sides of the equation to crea
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Answer:

According to steps 2 and 4. The second-order polynomial must be added by -c and b^{2} to create a perfect square trinomial.

Step-by-step explanation:

Let consider a second-order polynomial of the form a\cdot x^{2} + b\cdot x + c = 0, \forall \,x \in\mathbb{R}. The procedure is presented below:

1) a\cdot x^{2} + b\cdot x + c = 0 (Given)

2) a\cdot x^{2} + b \cdot x = -c (Compatibility with addition/Existence of additive inverse/Modulative property)

3) 4\cdot a^{2}\cdot x^{2} + 4\cdot a \cdot b \cdot x = -4\cdot a \cdot c (Compatibility with multiplication)

4) 4\cdot a^{2}\cdot x^{2} + 4\cdot a \cdot b \cdot x + b^{2} = b^{2}-4\cdot a \cdot c (Compatibility with addition/Existence of additive inverse/Modulative property)

5) (2\cdot a \cdot x + b)^{2} = b^{2}-4\cdot a \cdot c (Perfect square trinomial)

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7 0
2 years ago
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Answer:

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Step-by-step explanation:

4y=32

Taking 4 to the other side

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Step-by-step explanation:

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a square is a rectangle as it's a shape with 4 sides with 90degree angles, and pairs of sides are equal.

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