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3 years ago

Factorise 84xy+196x-36y-84

Mathematics

1 answer:

LenaWriter [7]3 years ago

4 0

Hi,

84xy+196x-36y-84

4(21xy+49x-9y-21)

4(7x × (3y+7)-9y-21)

4(7x × (3y+7)-3(3y+7)

4(3y+7)×(7x-3)

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3 years ago

Is ( 0,0) a solution to this system? y<=x^2-4 y>2x-1?

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Answer:

The point $(0,0)$ is not a solution of the system of inequalities

Step-by-step explanation:

we have

$y\leq x^{2} -4$ -----> inequality A

$y> 2x-1$ -----> inequality B

we know that

If a ordered pair is a solution of the system of inequalities

then

the ordered pair must be satisfy the inequalities of the system

Verify

For $x=0, y=0$

substitute the value of x and the value of y in the inequalkity A and in the inequality B

Inequality A

$0\leq 0^{2} -4$

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therefore

The point $(0,0)$ is not a solution of the system of inequalities

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