48.2k views
5 votes
Which equation has the same solution as x^2 - 8x - 15 =3

1 Answer

0 votes

Answer:

x^2 - 6x -18 is the same so you can write

x^2 - 6x -18 = ( x^2 - 8x - 15 = 3)

Explanation:

When we subtract 3 each side we get -18 as -15 -3 is -18

x^2 - 6x -15 = 3

x^2 - 6x -15- 3 =

x^2 - 6x - 18 = 0

When equations equal or set equal to zero we can then use the quadratic formula found in your book.

x1

= −(−8) − √ (−8)2 − 4×1×(−18) / 2×1

= 8 − 2 × √ 34

/2

≈ −1.831

x^2

= −(−8) + √ (−8)2 − 4×1×(−18)

/2×1

= 8 + 2 × √ 34 / 2

≈ 9.831

User Anders Metnik
by
8.4k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories