Anonymous

If 3x^2 = 75 then x = + or - 5

Anonymous

3x²=y=75 Transitive property of equality 3x²=75 Divide both sides by 3 x²=25 Sum both sides by -25 x²-25=0 Apply resolution formula for 2° equation x=[0±√(0-(4*(-25]/2=±√100/2=±10/2=±5 Two solutions x₁=-5 x₂=5

Anonymous

Given .....3x² = y and y = 75 We get .....3x² = 75 .....x² = 75/3 = 25 .....x = √25 So .....x = +5 or -5...............ANS