Question

The steps to derive the quadratic formula are shown below:

Step 1 ax2 + bx + c = 0
Step 2 ax2 + bx = - c
Step 3 x2 + b over a times x equals negative c over a
Step 4x2 + b over a times x plus b squared over 4 times a squared equals negative c over a
Step 5 x2 + b over a times x plus b squared over 4 times a squared equals negative 4 multiplied by a multiplied by c, all over 4 multiplied by a squared plus b squared over 4 times a squared
Step 6 the square of the quantity x plus b over 2 times a equals b squared minus 4 multiplied by a multiplied by c, all over 4 times a squared

Answer 1

Step 7 x plus b over 2 times a equals plus or minus square root of the quantity b squared minus 4 times a times c over 4 times a squared equals plus or minus square root of b squared minus 4 times a times c, all divided by 2 times a
Step 8 x = -negative b over 2 times a plus or minus square root of b squared minus 4 times a times c, all divided by 2 times a
Step 9 x = negative b plus or minus square root of b squared minus 4 times a times c, all divided by 2 times a

Answer 2

Which of the following is the first incorrect step?
Step 4

Step 6

Step 7

Step 8

Answer 3

Please help medal!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 4

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Answer 5

@cwrw238 please help me

Answer 6

I'm looking at step4 but i'm not sure how to interpret it - thats the probem when you write these thing out

Answer 7

at step4 if i remember correctly you complete the square

so you have