Question

The value of expression when 5x²- 2 when x=3 is​

Answer 1

Solve by FactoringSolve with the Quadratic Formula solve by Completing the Square find Discriminant
Let's solve your equation step-by-step.
5x2−2x=3 Step 1: Subtract 3 from both sides. 5x2−2x−3=3−35x2−2x−3=0 Step 2: Factor left side of equation. (5x+3)(x-1)=0 Step 3: Set factors equal to 0. 5x+3=0 or x−1=0x=−35 or x=1
Answer: x=−35 or x=1

Answer 2

43

Explanation:

Substitute x = 3 into the expression, that is

5(3)² - 2 = 5(9) - 2 = 45 - 2 = 43