Rozwiąż równanie kwadratowe:
2x²-11=7
-2x²+11=7
x² = 9x² - 9 = 0(x-3)(x+3) = 0x = 3 lub x = -3x² = 2x² - 2 = 0(x - √2)(x+√2) = 0(x - √2) = 0 lub (x+√2) = 0x = √2 lub x = -√2
2x² - 11 = 72x² = 7 + 112x² = 18 /:2x² = 9x² - 9 = 0(x-3)(x+3) = 0x = 3 lub x = -3-2x² = 7 - 11-2x = -4 / (-2)x² = 2x² - 2 = 0(x - √2)(x+√2) = 0(x - √2) = 0 lub (x+√2) = 0x = √2 lub x = -√2
Pozdrawiam! ; D
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x² = 9
x² - 9 = 0
(x-3)(x+3) = 0
x = 3 lub x = -3
x² = 2
x² - 2 = 0
(x - √2)(x+√2) = 0
(x - √2) = 0 lub (x+√2) = 0
x = √2 lub x = -√2
2x² - 11 = 7
2x² = 7 + 11
2x² = 18 /:2
x² = 9
x² - 9 = 0
(x-3)(x+3) = 0
x = 3 lub x = -3
-2x² = 7 - 11
-2x = -4 / (-2)
x² = 2
x² - 2 = 0
(x - √2)(x+√2) = 0
(x - √2) = 0 lub (x+√2) = 0
x = √2 lub x = -√2
Pozdrawiam! ; D