Question

2zx2y=18 where x=1,z=y

Answer 1

$\huge \bf༆ Answer ༄$

Let's plug the given values and find value of y ~

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:2zx2y = 18$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:2 \times y \times 1 \times 2 \times y = 18$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:4 {y}^{2} = 18$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:{y}^{2} = \dfrac{18}{4}$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:y {}^{2} = 4.5$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:y = \sqrt{4.5}$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:y = \sqrt{9 \times 0.5}$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:y = 3 \sqrt{ \frac{5}{10} }$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:3 \sqrt{ \frac{1}{2} }$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \: \dfrac{3}{ \sqrt{2} }$

or, you can further simplify it to ;

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:2.12 \: \: (upto \: \: two \: decimals)$

Answer 2

Plug in the values: 2(y)(1)2y=18
First multiply 1 with 2y = 2y(2y)=18
Second multiply 2y and 2y = 4y^2=18
Third divide both sides by 4 = 4y^2/4=18/4
—-> y^2=9/2
Fourth square root both sides = y= √ 9/2 (in square root)
If you need to simplify further you would get 3 √2/2