Question

31.8 и 31.9 помогите
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Answer 1

1)x-16=0

2 x=16

X=±4

x=-4

x=4

2)25-y2=o

у2 = 25

у2 = 25

y=±5

y =-5

y = 5

3)3,24-z^2=0

81/25-z^2 = 0

81-25z^2=0

-25z^2 =- 81

z^2=81/25

z=+-9/5

4)144/169 - n^2 = 0

144-169n^2=0

-169n^2=-144

n^2=144/169

n=±12/13

5)7,29-m² = 0

729/100-m^2=0

729 - 100m² = 0

-100m^2=-729

m^2 = 729/100

m^2 = ±27/10

6)k^2-196/625 =0

625k^2-196=9

625k^2=196

k^2=196/625

k=+-14/25