3 years ago

Simplify the expression 2x - 4 +2 - 2x

Mathematics

1 answer:

horsena [70]3 years ago

8 0

Answer:

-2

Step-by-step explanation:

2x - 4 +2 - 2x

Combine like terms

2x-2x -4+2

0x -2

-2

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-5x-3y = -7
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Step-by-step explanation:

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3 years ago

Let t = cosA + sinA find values of t if 2 - sin2A = 2(cosA + sinA)

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When $A\in\mathbb{R}$

$t=\cos A+\sin A\in[-\sqrt{2};\sqrt{2}]\approx[-1.4142;1.4142]$

and there is only one answer t = 1.

For $A\in\mathbb{C}$ both values are correct.

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4 years ago