itsnami itsnami

25-05-2020
Mathematics

contestada

If x2 - x - 42 = (x +k) (x + 6) then the value of k is

Respuesta :

TheLazyNobita TheLazyNobita

25-05-2020

x² - x - 42 = ( x+k )( x+6)

x² - 7x + 6x -42 = (x+k)(x+6)

x(x-7) + 6(x -7) = (x+k)(x+6)

(x-7)(x+6) = (x+k)(x+6)

(x+6) gets cancelled

Thus

x-7 = x+k

k = -7

Answer Link

Otras preguntas

what is the answer to 210(.59)6(.41)4

R = 6² - (-3)³ + (-4)²

Write an equation for the function graphed above.

20 kg dog. 25mg/kg of Previcox P.O. B.I.D. for 30 days. Previcox (227mg/tab). How many tabs are to go home

prove using completeness of axiom that set s =(2^n:nEN) is not bounded above

120 degree vertical angle (2x) degree Write an equation that can be used to find the value of x

solve 29, 31, 33, 35, 37 pls. my teacher gave up with teaching us 8.5.

Which is the most frequently used format to save an Access file? Save As File Types ос OB D A Save Database As Save Object As Save Database As Database File Typ

Pete Air wants to buy a used Jeep in 3 years. He estimates the Jeep will cost $15,600. Assume Pete invests $10,600 now at 8% interest compounded semiannually. a

An astronaut on the moon throws a baseball upward. The astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 40 ft per sec. The height s of t