Ответ:
x²+2x-15 = 0
x² - 3x + 5x - 15 = 0
(х-3)(х+5)=0
х-3=0. х+5=0
х=3. х=-5
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Ответ:
x²+2x-15 = 0
x² - 3x + 5x - 15 = 0
(х-3)(х+5)=0
х-3=0. х+5=0
х=3. х=-5