01-09-2019
Mathematics

contestada

How to solve the above simultaneous equation?

How to solve the above simultaneous equation class=

Respuesta :

01-09-2019

Answer:

C -2 or 1

Step-by-step explanation:

So from the equation you have x^2-x-1=-2*x+1

x^2-x-1+2*x-1=0

x^2 +x -2 =0

D= 1^2 -4*(-2)= 1+8=9

x = (-1+-3)/2

So x is either (-1+3)/2=2/2=1

or (-1-3)/2=-2

Answer Link

Otras preguntas

please help dont need working out thanks.

5% is Rs 50 topic is percent

Divide 0.0844 /(-0.72) and round to the nearest hundreths

Evaluate the following if a = 3,b= -2 and c = 1 a3 - 2bc +5ac

Draw the reflection of the quadrilateral across the x-axis.

Pls help me i will give u brainlist

PLZZ HELP ME ILL GIVE BRAINLIEST TO THE FIRST PERSON WHO ANSWERS THIS CORRECTLY!! 7. What major Axis Power was not part of the Marshall Plan, but did receive a

10) In circle J, RS 17). Find the m RS. P R US A) 12 B) 13 C) 18 D) 24 15 T 13

D is the answer I have the picture for proof,

choose the correct anwer 9: the range of the gravitional force is given by A: 10_2m B:10_15m C: infinite D: 10_10m