Expand & simplify (3x-4)^2 - (x+1)(x-1) Please anyone? I'm really bad at maths-
1 answer:
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Answer:
x = -
Step-by-step explanation:
given the equation
(x - 2) = 4x
multiply both sides by 5 to eliminate the fraction
2(x - 2) = 20x
2x - 4 = 20x ( subtract 2x from both sides )
- 4 = 18x ( divide both sides by 18 )
x = - = -
Answer:
Part A) The system has one solution
Part B) The solution is the point (2.54,3.69)
Step-by-step explanation:
step 1
Find the equation of line A
<em>Find the slope </em>
we have
(2,6) and (5,0)
m=(0-6)/(5-2)=-6/4=-1.5
<em>Find the equation of the line</em>
with the slope m and point (5,0)
y-0=-1.5(x-5)
y=-1.5x+7.5 -----> equation A
step 2
Find the equation of line B
<em>Find the slope </em>
we have
(0,2) and (6,6)
m=(6-2)/(6-0)=4/6=2/3
<em>Find the equation of the line</em>
with the slope m and point (0,2)
y-2=(2/3)(x-0)
y=(2/3)x+2 -----> equation B
step 3
Solve the system of equations
y=-1.5x+7.5 -----> equation A
y=(2/3)x+2 -----> equation B
Solve the system by graphing
Remember that the solution of the system is the intersection point both graphs
The system has one point of intersection
therefore
The system has only one solution
The solution is the point (2.54,3.69)
see the attached figure
