Odpowiedź :
h.) 2x³-12x²-7x+42=0
(2x³ -7x)- (12x²-42) = 0
x(2x²-7) - 6(2x² -7) = 0
(x-6)(2x²-7) = 0
x = 6 lub 2x² =7
x² = 7/2
x=√(7/2) lub x = -√(7/2)
i.) (x²-3x+2)(x²-4)(4-x)=0
x²-3x+2 = 0 lub x²-4 =0 lub 4-x=0
Δ = 9 -8 = 1 x₃ = 2 lub x₄ = -2 lub x=4
x₁ = 3-1/2 = 2/2 = 1
x₂ = 3+1/2 = 4/2 = 2
j) (x-7)²-4 = 0
(x-7)² = 4
x² -14x +45 = 0
Δ =196 -180 = 16
x₁ = 14-4/2 = 10/2 = 5
x₂ = 14+4/2 = 18/2 = 9
k.)6x⁴-4x³ = 0
x³(6x-4) = 0
x = 0 lub 6x =4
x =0 lub x =2/3
reszta rozwiazana w załączniku
(2x³ -7x)- (12x²-42) = 0
x(2x²-7) - 6(2x² -7) = 0
(x-6)(2x²-7) = 0
x = 6 lub 2x² =7
x² = 7/2
x=√(7/2) lub x = -√(7/2)
i.) (x²-3x+2)(x²-4)(4-x)=0
x²-3x+2 = 0 lub x²-4 =0 lub 4-x=0
Δ = 9 -8 = 1 x₃ = 2 lub x₄ = -2 lub x=4
x₁ = 3-1/2 = 2/2 = 1
x₂ = 3+1/2 = 4/2 = 2
j) (x-7)²-4 = 0
(x-7)² = 4
x² -14x +45 = 0
Δ =196 -180 = 16
x₁ = 14-4/2 = 10/2 = 5
x₂ = 14+4/2 = 18/2 = 9
k.)6x⁴-4x³ = 0
x³(6x-4) = 0
x = 0 lub 6x =4
x =0 lub x =2/3
reszta rozwiazana w załączniku

h.) 2x³-12x²-7x+42=0
(2x³ -7x)- (12x²-42) = 0
x(2x²-7) - 6(2x² -7) = 0
(x-6)(2x²-7) = 0
x = 6 lub 2x² =7
x² = 7/2
x=√(7/2) lub x = -√(7/2)
i.) (x²-3x+2)(x²-4)(4-x)=0
x²-3x+2 = 0 lub x²-4 =0 lub 4-x=0
Δ = 9 -8 = 1 x₃ = 2 lub x₄ = -2 lub x=4
x₁ = 3-1/2 = 2/2 = 1
x₂ = 3+1/2 = 4/2 = 2
j) (x-7)²-4 = 0
(x-7)² = 4
x² -14x +45 = 0
Δ =196 -180 = 16
x₁ = 14-4/2 = 10/2 = 5
x₂ = 14+4/2 = 18/2 = 9
k.)6x⁴-4x³ = 0
x³(6x-4) = 0
x = 0 lub 6x =4
x =0 lub x =2/3
_________
Tylko tyle! ;[ Ale zawsze coś! ;)
(2x³ -7x)- (12x²-42) = 0
x(2x²-7) - 6(2x² -7) = 0
(x-6)(2x²-7) = 0
x = 6 lub 2x² =7
x² = 7/2
x=√(7/2) lub x = -√(7/2)
i.) (x²-3x+2)(x²-4)(4-x)=0
x²-3x+2 = 0 lub x²-4 =0 lub 4-x=0
Δ = 9 -8 = 1 x₃ = 2 lub x₄ = -2 lub x=4
x₁ = 3-1/2 = 2/2 = 1
x₂ = 3+1/2 = 4/2 = 2
j) (x-7)²-4 = 0
(x-7)² = 4
x² -14x +45 = 0
Δ =196 -180 = 16
x₁ = 14-4/2 = 10/2 = 5
x₂ = 14+4/2 = 18/2 = 9
k.)6x⁴-4x³ = 0
x³(6x-4) = 0
x = 0 lub 6x =4
x =0 lub x =2/3
_________
Tylko tyle! ;[ Ale zawsze coś! ;)