Question

Solve for x: 8x^2 + 64x = 0

x = 0, x = −8

x = 0, x = 8

x = −8, x = 0, x = 8

x = 8, x = 64

Answer 1

@Haseeb96

Answer 2

@tester97

Answer 3

its a
do u know how ?

Answer 4

No can you please explain it?

Answer 5

okay its very simple
8x^2 + 64x = 0
8x ( x + 8 ) =0
either 8x = o then x= 0
or x+8 = 0 then x = -8
x = {0 , -8}

Answer 6

Thank you! Can you help me with a few more?

Answer 7

sure

Answer 8

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. 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.

Step 1

Step 2

Step 3

Step 4

Answer 9

@Hamoody1996

Answer 10

2

Answer 11

Thanks!

Answer 12

Solve for x: 25x^2 − 36 = 0

x = 6, 5

x = −6, −5

x = 36 over 25, x = − 36 over 25

x = 6 over 5, x = − 6 over 5

Answer 13

x = 6 over 5, x = − 6 over 5

Answer 14

How can you tell when a quadratic equation has two identical, rational solutions?

When the radicand is negative

When b in the quadratic formula is greater than the radicand

When the radicand equals zero

When the radicand is not a perfect square