How to solve y=x^3 and y=x^2 simultaneously?
Please provide working, any help is appreciated.. thanks!
回答 (9)
✔ 最佳答案
x³ = x²
x³ - x² = 0
x ² ( x - 1) = 0
x = 0 , x = 1
y = 0 , y = 1
(0,0) , (1,1)
y = x^3 (solve by using substitution)
y = x^2
y = x^3
x^2 = x^3
x^3 - x^2 = 0
x^2(x - 1) = 0
x^2 = 0
x = 屉0
x = 0
x - 1 = 0
x = 1
y = x^2
y = 0^2
y = 0
y = 1^2
y = 1
â´ (x = 0 , y = 0) , (x = 1 , y = 1)
Label y=x^3 as equation 1
y=x^2 as equation 2
Then substitute equation 1 into 2 we get x^3=x^2
Then x^3 - x^2=0
Factorise x^2(x - 1)=0
Then x=0 or 1
Substitute x=0 into equation 1
y= 0^3
y=0
Substitute x=1 into equation 1
y=1^3
y=1
y = x^3
y = x^2
Subtract the two equations to get:
x^3 - x^2 = y - y
x^3 - x^2 = 0
x^2(x - 1) = 0
x = 0 or x = 1
If x = 0, y = 0 (after substituting x in original equation)
If x = 1, y = 1 (after substituting x in original equation)
x³ = x²
x³ - x² = 0
x²(x - 1) = 0
x = 0 or 1
x^3 - x^2 = 0
x^2 (x-1) = 0
x = 0 or 1
y = 0 or 1
the 2 curves intersect in (0,0) & (1,1)
Set equal to each other. Recognize that x =0, 1 are the answers.
It is not possible to solve them simultaneously.
If y = x^3 and y = x^2 are not simultaneous equations since,
x^3 not equal to x^2
-rds
收錄日期: 2021-05-01 11:59:12
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