Solve for x : x²=12x-21 (correct to one decimal place )

Question

asked Jun 13, 2024 47.2k views

1 Answer

Maxim Kulikov · Answer 1 · 2024-06-19T01:09:51+0000

Answer: x = 2.1 or x = 9.9

Step-by-step explanation: rewrite as:
x^2 -12x+21 = 0

a = 1, b = -12, c = 21 [sub into quadratic formula:
=
(-b(+)/(-) √(b^2-4ac))/(2a) ]