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 times negative six, end quantity, all over 2 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.

Error is in step 2

Step-by-step explanation:

Harry is trying to solve the equation y = 2x^2 − x − 6 using the quadratic formula. He has made an error in one of the steps below.

Step 1:

Step 2:

Step 3:  

Step 4:  

Quadratic formula is

From the given equation a= 2, b= -1  and c= -6

plug in all the values in the formula

Step 1:

Step 1 is correct

(-1)^2 = -1  times -1 = +1 (negative times negative is positive)

Instead of +1 , Harry used -1 inside the square root

So the error is in step 2

Step 2:

15 units use socratic

step-by-step explanation: 15 units

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.