What are the roots of the equation y=x squared +x-42

Question

04-03-2015
Mathematics

contestada

What are the roots of the equation y=x squared +x-42

Respuesta :

Otras preguntas

3) A first grader claims that 2-4 = 0 because you can't have anything less that nothing. How do you respond? (be very specific; use a concrete example and remem

I don't understand this can someone help please

PLEASE HELP In foreign policy, the Federalists believed that the United States needed to build a powerful national state to gain equality with the great powers

Which of these are part of a basic plot structure? Select three options A. Exposition B. Climax C. Character motivation D. Falling action E. Theme

A chicken is traveling at a speed of 9.3 mph. How far does it get in 30 minutes? A) 27 miles B) 4.65 miles C) 18.6 miles please don't guess :(

PLS CAN U HELP ME N THIS

I called, but he didn't _____his phone.

Need Help!What conclusion can be drawn about the number of elements the make up the majority of the world in which we live and the total number of elements iden

А={a,b,c,d,e}, B={a,d,f}, C={b,e,f,g}, D={a,f,g,h}. Find the sets if we know that: S⫅A, S∩(B∪D)=∅, (A∩C)\S=∅ and {c}\s={c}

Simplify this fraction. 6/5

Panoyin Panoyin · Answer 1 · 2015-03-04T01:07:05+01:00

y = x² + x - 42
x² + x - 42
x = -1 +/- √(1² - 4(1)(-42))
   2(1)
x = -1 +/- √(1 + 168)
   2
x = -1 +/- √169
   2
x = -1 +/- 13
   2
x = -1 + 13 x = -1 - 13
2 2
x = 10 x = -14
   2     2
x = 5 x = -7
-----------------------------------------------------------------------------------------------
y = x² + x - 42 y = x² + x - 42
y = (5)² + 5 - 42 y = (-7)² + 5 - 42
y = 25 + 5 - 42    y = 49 + 5 - 42
y = 30 - 42    y = 54 - 42
y = -12    y = 12
(x, y) = (5, -12)    y = (-7, 12)