1.
1) 2х² + 7х - 4 = 0
D = 49 - 4 × 2 × (-4) = 81 > 0. 9.
х1 = ( -7 + 9 ) / 4 = 2/4 = 0,5.
х2 = ( -7 - 9 ) / 4 = -16/4 = -4.
2) 3х² + 10х - 8 = 0
D = 100 - 4 × 3 × (-8) = 196 > 0. 14.
х1 = ( -10 + 14 ) / 6 = 4/6 = 2/3.
х2 = ( -10 - 14 ) / 6 = -24/6 = -4.
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2. -6х² - 17х + 3 = 6 ( х + 3 ) ( х + 1/6).
D = 289 - 4 × (-6) × 3 = 361. 19.
х1 = -( 17 + 19 ) / 12 = -3.
х2 = - ( 17 - 19 ) / 12 = -2/12 = -1/6.
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Удачи✨)))))
1.
1) 2х² + 7х - 4 = 0
D = 49 - 4 × 2 × (-4) = 81 > 0. 9.
х1 = ( -7 + 9 ) / 4 = 2/4 = 0,5.
х2 = ( -7 - 9 ) / 4 = -16/4 = -4.
2) 3х² + 10х - 8 = 0
D = 100 - 4 × 3 × (-8) = 196 > 0. 14.
х1 = ( -10 + 14 ) / 6 = 4/6 = 2/3.
х2 = ( -10 - 14 ) / 6 = -24/6 = -4.
_________________________________
2. -6х² - 17х + 3 = 6 ( х + 3 ) ( х + 1/6).
D = 289 - 4 × (-6) × 3 = 361. 19.
х1 = -( 17 + 19 ) / 12 = -3.
х2 = - ( 17 - 19 ) / 12 = -2/12 = -1/6.
________________________________
Удачи✨)))))