y = 1/4x² y = 5x - 17
1/4x² = 5x - 17
x² - 20x + 68 = 0
D = (- 20)² - 4 * 68 = 400 - 272 = 128 = (8√2)²
Координаты точек пересечения :
А)(11a - 9b)(11a + 9b)
б) (4x - 7y)^2 = (4x - 7y)(4x - 7y)
в) ( 5x + 3y)(25x^2 - 15xy + 9y^2)
г) ( a - x)^3 = (a - x)(a - x)(a - x)
д) a^5 + 32b^5 = (a+2b)(a^4-2a^3b+4a^2b^2-8ab^3+16b^4)
T^2 + 18t + 56 = 0
D = 324 - 224 = 100
t1 = ( - 18 + 10)/2 = - 8/2 = - 4
t2 = ( - 18 - 10)/2 = - 28/2 = - 14