Answer:
Step-by-step explanation:
let the number be x
Square of a number: x²
Twice the square of a number = 2*x² = 2x²
Three less than twice the square of a number = 2x² - 3
2x² - 3 = 47 {Add 3 to both sides}
2x² = 47 + 3
2x² = 50 {Divide both sides by 2}
x² = 50/2
x² = 25 Take square root
x = √25
x = 5
