Harry is trying to solve the equation y = 2x2 - x - 6 using the quadratic formula. He has made an error in one of the steps below. Find the step where Harry went wrong. Step 1: x equals the negative of negative 1 plus or minus the square root of the quantity negative one squared minus 4 times 2 Step 2: x equals the negative of negative 1 plus or minus the square root of negative one plus forty-eight all over two times 2 Step 3: x equals the negative of negative 1 plus or minus the square root of forty-seven all over two times 2. Step 4: x equals 1 plus or minus the square root of forty-seven all over 4.

Question

Mathematics

Chips

11 March, 09:10

Harry is trying to solve the equation y = 2x2 - x - 6 using the quadratic formula. He has made an error in one of the steps below. Find the step where Harry went wrong. Step 1: x equals the negative of negative 1 plus or minus the square root of the quantity negative one squared minus 4 times 2 Step 2: x equals the negative of negative 1 plus or minus the square root of negative one plus forty-eight all over two times 2 Step 3: x equals the negative of negative 1 plus or minus the square root of forty-seven all over two times 2. Step 4: x equals 1 plus or minus the square root of forty-seven all over 4.

+3

Answers (1)

Know the Answer?

Benjamin Cohen · Answer 1

The error made was in step two because you do not add 1 and 48, you subtract. this would result in "no solution" since you can't find the square root of a negative number