Canon F-788SG, Инструкция пользователя, Страница: 43 / 57

42
Simultaneous Linear Equations
Two Unknowns Simultaneous Linear Equation:
a
1
x + b
1
y = c
1
a
2
x + b
2
y = c
2
Three Unknowns Simultaneous Linear Equation:
a
1
x + b
1
y + c
1
z = d
1
a
2
x + b
2
y + c
2
z = d
2
a
3
x + b
3
y + c
3
z = d
3
Example: Solve the simultaneous equation with three unknowns:
2x + 4y – 4z = 20
2x – 2y + 4z = 8
5x – 2y – 2z = 20
Example: Solve the cubic equation 5x 3 + 2x 2 – 2x+1 = 0
Quadratic or Cubic Equations
Quadratic equation : ax
2
+ bx + c = 0 (a second-order polynomial
equation in a single variable x)
Cubic equation : ax 3 + bx 2 + cx + d = 0 (an equation with cubic
polynomial)
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Operation
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