Penelope determined the solutions of the quadratic function by completing the square.

f(x) = 4x2 + 8x + 1
–1 = 4x2 + 8x

–1 = 4(x2 + 2x)

–1 + 1 = 4(x2 + 2x + 1)

0 = 4(x + 2)2

0 = (x + 2)2

0 = x + 2

–2 = x

What error did Penelope make in her work?

C on edg alg 2 camp

i know because i guessed and got it right

Answers for Entire Assignment:

Page 1 --> (C) Penelope should have added 4 to both sides instead of adding 1.

Page 2 --> 50 , 3 , -8

Page 3 --> Add 4 , Subtract 24 from 5 , 2

Page 4 --> -2 , Add 25/4 , Subtract 25/2 , 5/2

Page 5 --> (A) 18 + 81 = 9(x2 + 6x + 9), (D) 11 = (x + 3)2

Page 6 --> 56 , 112 , 16

Page 7 --> (B) 3 = 5x2 – 10x , (D) 8 = 5(x2 – 2x + 1) , (G) 8/5 = (x – 1)2

Page 8 --> (D)

Page 9 --> Yes, the equation can be solved by factoring. Using the given equation, take the square root of both sides. Both 169 and 9 are perfect squares, so the left side becomes plus or minus 13/3, which is rational. Six plus 13/3 is a rational number, and 6 minus 13/3 is also a rational number. If the solutions of a quadratic equation are rational, then the equation is factorable.

I gottchu, get that 100.

6,250

step-by-step explanation:

to get the area, multiply 360 by 160.(57,600)

to find out how many bags of fertilizer it will take, first figure out how many square feet one bag can hold. divide 1000 by 8(125) to get the unit rate(how many square feet one pound of fertilizer can hold)and multiply it by 50(6250). if i haven't made a mistake, that is the answer.

step-by-step explanation:

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