Solve. x2 + 8x = –13
(x+4)^2-3=0 x^2+8x+13=0
I'm still confused
What you need help in?
Write out x(x+8)=-13
The final answer?
Final answer is x^2+8x+13=0
Add '-13' to each side of the equation. 13 + 8x + -13 + x2 = 0 + -13 Reorder the terms: 13 + -13 + 8x + x2 = 0 + -13 Combine like terms: 13 + -13 = 0 0 + 8x + x2 = 0 + -13 8x + x2 = 0 + -13 Combine like terms: 0 + -13 = -13 8x + x2 = -13 The x term is 8x. Take half its coefficient (4). Square it (16) and add it to both sides. Add '16' to each side of the equation. 8x + 16 + x2 = -13 + 16 Reorder the terms: 16 + 8x + x2 = -13 + 16 Combine like terms: -13 + 16 = 3 16 + 8x + x2 = 3 Factor a perfect square on the left side: (x + 4)(x + 4) = 3 (x + 4) equal to 1.732050808 and -1.732050808
here are the choices –4 ± √3 –4 ± √17 –4 ± √21 –4 ± √29
Its the first one
–4 ± √29
Wait what? which one is the real correct answer?
Omg everyone is confusing her
–4 ± √29 enter it in your calculator as -4+√29
Yeah, but you both told me different answers I'm super confused
The other person does not know what they are talking about
How did you get the answer for it then?
SImpleton must be smart, Well sometimes guesses work =)
i did x + 4 = 1.732050808 Simplifying x + 4 = 1.732050808 Reorder the terms: 4 + x = 1.732050808 Solving 4 + x = 1.732050808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 1.732050808 + -4 Combine like terms: 4 + -4 = 0 0 + x = 1.732050808 + -4 x = 1.732050808 + -4 Combine like terms: 1.732050808 + -4 = -2.267949192 x = -2.267949192 Simplifying x = -2.267949192 that gives you -4-√29
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