Question

Solve the equation x^2 – 16x + 25 = 0 to the nearest tenth.

Answer 1

1.8 and 14.3

Explanation:

Our equation is a quadratic equation so we will use the dicriminant method

• Let Δ be our dicriminant
• a=1
• b= -16
• c= 25
• Δ= (-16)²-4*25*1=156≥0
• so we have two solutions : x and y
• x= (16-
  `√(156)`)/2= 1.7555≈ 1.8
• y=(16+
  `√(156)`)/2=14.244≈ 14.3