Problem #2 Use the graphical method to solve: 2x₁6x₂-18 -X₁ + 8x₂ = 40 Check your results by substituting them back into the equations.

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter12: Quadratic Functions
Section12.3: The Quadratic Formula
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Use the same method that i attached
Problem #2
Use the graphical method to solve:
2x₁6x₂-18
=
-X₁ + 8x₂ = 40
Check your results by substituting them back into the equations.
Transcribed Image Text:Problem #2 Use the graphical method to solve: 2x₁6x₂-18 = -X₁ + 8x₂ = 40 Check your results by substituting them back into the equations.
• For two equations:
a₁₁x₁ + ₁₂x₂=b₁₂
a₂₁x₁ + a₂2x₂=b₂
Solve both equations for X₂
b
x₁ +
x₂ = -
3x₁ + 2x₂ = 18
-X₁ + 2x₂ = 2
7/4/2023
12 a12
-(²-)+22
b₂
am
Plot x₂ vs. x₁, the
intersection of the
lines is the solution
Graphical Method
7/4/2023
X₂ ==
=>
Or equate and solve for x₁
( 111 )x; + 12
a12
No solution
Cal
⇒ x₂ = (slope)x, + intercept
324
a21 a
a22
2
-₂ X 2¹₂-2
Graphical Method
=
aa
a22 912
+2-18
2
-I
(an)
b₁ b₂=0
912922
2+1)x₁+
12.
bb₂
b₂ b
a12 a22 a22 12
a a
a22 12.
2+1) X₁ +
Solution: , 4; -3
(bi
Numerical methods
Infinite solutions
- +2₂-2
7
5
b₂
az
7
34
Ill-conditioned
(Slopes are too close)
Visually difficult to know
Transcribed Image Text:• For two equations: a₁₁x₁ + ₁₂x₂=b₁₂ a₂₁x₁ + a₂2x₂=b₂ Solve both equations for X₂ b x₁ + x₂ = - 3x₁ + 2x₂ = 18 -X₁ + 2x₂ = 2 7/4/2023 12 a12 -(²-)+22 b₂ am Plot x₂ vs. x₁, the intersection of the lines is the solution Graphical Method 7/4/2023 X₂ == => Or equate and solve for x₁ ( 111 )x; + 12 a12 No solution Cal ⇒ x₂ = (slope)x, + intercept 324 a21 a a22 2 -₂ X 2¹₂-2 Graphical Method = aa a22 912 +2-18 2 -I (an) b₁ b₂=0 912922 2+1)x₁+ 12. bb₂ b₂ b a12 a22 a22 12 a a a22 12. 2+1) X₁ + Solution: , 4; -3 (bi Numerical methods Infinite solutions - +2₂-2 7 5 b₂ az 7 34 Ill-conditioned (Slopes are too close) Visually difficult to know
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