RÓWNANIE ;
X +(x*2 ) + (x+7) =39
x+2x-x-7=39
2x-7=39
2x=39+7
2x=46 dzielimy przez 2
x=23
o to ci chodziło?
x + x² + x + 7 = 39
x² + 2x + 7 - 39 = 0
x² + 2x - 32 = 0
Δ = 2² - 4 * 1 * (-32) = 4 + 128 = 132
√Δ = 2√33
x1 = (-2 - 2√33)/2 = -1 - √33
x2 = (-2 + 2√33)/2 = -1 + √33
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x+2x-x-7=39
2x-7=39
2x=39+7
2x=46 dzielimy przez 2
x=23
o to ci chodziło?
x + x² + x + 7 = 39
x² + 2x + 7 - 39 = 0
x² + 2x - 32 = 0
Δ = 2² - 4 * 1 * (-32) = 4 + 128 = 132
√Δ = 2√33
x1 = (-2 - 2√33)/2 = -1 - √33
x2 = (-2 + 2√33)/2 = -1 + √33