Iloczyn dwóch liczb jest równy 35 Jeden z czynników jest o 2 większy od drugiego.jakie to czynniki???
1 czynnik ----x
2 czynnik --- x + 2
x * (x + 2) = 35
x^2 + 2x - 35 = 0
Δ = 4 - 4 * 1 * (-35) = 4 + 140 = 144
√Δ = 12
x1 = (-2 - 12) / 2 = -14/2 = -7
x2 = (-2 + 12) / 2 = 10 / 2 = 5
1 czynnik ----x = -7
2 czynnik --- x + 2 = -7 + 2 = -5
lub
1 czynnik ----x = 5
2 czynnik --- x + 2 = 5 + 2 = 7
odp. są to: 5, 7 lub (-5) i (-7)
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1 czynnik ----x
2 czynnik --- x + 2
x * (x + 2) = 35
x^2 + 2x - 35 = 0
Δ = 4 - 4 * 1 * (-35) = 4 + 140 = 144
√Δ = 12
x1 = (-2 - 12) / 2 = -14/2 = -7
x2 = (-2 + 12) / 2 = 10 / 2 = 5
1 czynnik ----x = -7
2 czynnik --- x + 2 = -7 + 2 = -5
lub
1 czynnik ----x = 5
2 czynnik --- x + 2 = 5 + 2 = 7
odp. są to: 5, 7 lub (-5) i (-7)