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

The measures of two angles of triangle are 35 degrees and 45 degrees.What is the measure of the triangle?

The acme hardware store gives a discount to 4 of every 10 shoppers. What percent of the shoppers would receive a discount?

Although it is not directly stated in the order, it was assumed that individuals in Roosevelt’s executive order no. 9066 were targeted for internment because

PLEASE HELP!!! Read the following prompt and type your response in the space provided In term of energy, What is the difference between glucose and ATP?

standard form 4000,000+30,000+800+20+5

Select the best interrogative (question word) to complete the question. ¿_____________ quieres ir a comprar tan pronto? A. Quién B. Cuáles C. Por qué D. C

Which of these best describe Oliver Cromwell

what ealier documents refer to a right to civil jury?

A covalent chemical bond is one in which a.electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged.

A scientist's open- mindedness should always be balence do by bias true or false