Question

Need help will fan and medal

Answer 1

The steps to derive the quadratic formula are shown below:


Step 1 ax2 + bx + c = 0
Step 2 ax2 + bx = - c
Step 3 x squared over a plus b over a times x equals negative c over a
Step 4 x2 + b over a times x plus b squared over 4 times a squared equals negative c over a plus b squared over 4 times a squared
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
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


Which of the following is the first incorrect step?
Step 2
Step 3
Step 4
Step 7

Answer 2

@Preetha @confluxepic @Phebe @e.mccormick

Answer 3

@whpalmer4 @Quan99 @jim_thompson5910 @.....anyone?

Answer 4

can you post a screenshot of the problem?

Answer 5

one sec

Answer 6

@jim_thompson5910 ?

Answer 7

I'm looking it over now

Answer 8

okay

Answer 9

You have the correct answer. Step 3 is the first incorrect step because there shouldn't be an \(\Large \frac{x^2}{a}\) term. It should simply be \(\Large x^2\) instead.

Answer 10

Okay thanks! I thought so but I checked other discussions about this one and they put different things.