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jojomgarcia01

jojomgarcia01

27.05.2021 •

Mathematics

NEED HELP ASAP FOR AP CALC WORK

NEED HELP ASAP FOR AP CALC WORK

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Ответ:

molly7654

26.06.2021

B

The answer is b

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Ответ:

jobrains3220

30.01.2023

Step-by-step explanation:

1)

${x}^{2} - 3x = 0$

Taking -3x to R.H.S , the sign gets changed.

$= {x}^{2} = 3x$

Dividing x on both the sides ,

$= \frac{ {x}^{2} }{x} = \frac{3x}{x}$

= x = 3

2)

${x}^{2} + 7x = 0$

Taking 7x to R.H.S , the sign gets changed

$= {x}^{2} = - 7x$

Dividing x on both the sides ,

$= \frac{ {x}^{2} }{x} = \frac{ - 7x}{x}$

= x = - 7

3)

$2 {x}^{2} - 2x = 0$

Taking 2x as common from L.H.S ,

= 2x(x - 1) = 0

Dividing 2x on both the sides ,

$= \frac{2x(x - 1)}{2x} = \frac{0}{2x}$

= x - 1 = 0

= x = 1

4)

$3 {x}^{2} - x = 0$

Taking -x to R.H.S , the sign gets changed.

$= 3 {x}^{2} = x$

Dividing x on both the sides ,

$= \frac{3 {x}^{2} }{x} = \frac{x}{x}$

= 3x = 1

Dividing 3 on both the sides ,

$= \frac{3x}{3} = \frac{1}{3}$

$= x = \frac{1}{3}$

5)

${x}^{2} - 16 = 0$

Taking -16 to R.H.S , the sign gets changed.

${x}^{2} = 16$

$= x = \sqrt{16} = 4$

6)

${x}^{2} - 49 = 0$

Taking -49 to R.H.S , the sign gets changed.

$= {x}^{2} = 49$

$= x = \sqrt{49} = 7$

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