bbyhaiz02 bbyhaiz02

25-04-2017
Mathematics

contestada

what two numbers add to -7 and multiply to 12?

Respuesta :

25-04-2017

a+b=-7 and ab=12

from the first we can say a=-b-7 and using this value for a in the second we get:

(-b-7)b=12

-b^2-7b=12

b^2+7b+12=0

b^2+3b+4b+12=0

b(b+3)+4(b+3)=0

(b+4)(b+3)=0

So the numbers are -3 and -4

Answer Link

Otras preguntas

4x+5y=20 write this equation in slope intercept form

how do you write a good essay?

What were the main policies and changes set forth by the Congress of Vienna (1814-15)?

What two mixed numbers have a sum of 3

The perimeter of a sheet of paper is 38cm. If the width is 8 cm what is the length of the paper?

125 thousandths = 1 tenth _______________ thousandths

What details from the may 15th entry prove that Charlie's intelligence is growing and increasing daily ?

what is the equivalent of 1/50 : fraction , in decimal form

Can there be more than one point of intersection between the graphs of two linear equations?

list 10 processes that occur while an organism is alive, but cease when it is dead.