Question

Ex 3 va rog e urgent!!!!!!​

Answer 1

Răspuns:

a)x²=1 x1,2=±1

x²=81. x1,2=±9

4x²=1. x1,2=±1/2

2x²=8. x²=4. x1,2=±2

b)3x²=75. x1,2=±5

49x²=121. x1,2=±11/7

25x²=225/25. x²=5. x1,2=±√5

36x²=144. x1,2=±12/6=±2

c)x²-0,24=0. x²=24/100=6/25. x1,2=±√6/5

2x²-0,32=0 x²=16/100=>x1,2=±4/10=±2/5

4x²=0,04. x²=0,01. x²=1/100. x1,2=±1/10

3x²=10,8. x²=3,6 x1,2=6/√10