Разложите многочлен на множители
1)4a^2-4b^2-a-b =4a2−4b2−a−b=
(a+b)(4a-ab+1)
(a+b)(4a+ab+1)
(a-b)(4a-ab+1)
(a+b)(4a-4b-1)
2) 9x^2-9y^2-3x+3y =9x 2−9y 2−3x+3y=
3(x-y)(3x+3y+1)3(x−y)(3x+3y+1)
3(x+y)(3x+3y+1)3(x+y)(3x+3y+1)
3(x-y)(3x-3y+1)3(x−y)(3x−3y+1)
3(x-y)(3x+3y-1)3(x−y)(3x+3y−1)
3)16p^2-y^2+8y-16 =16p12−y2+8y−16=
(4p-y+4)(4p+y-3)(4p−y+4)(4p+y−3)
(4p+y+4)(4p+y-4)(4p+y+4)(4p+y−4)
(4p-y+4)(4p+y+4)(4p−y+4)(4p+y+4)
(4p-y+4)(4p+y-4)(4p−y+4)(4p+y−4)
4)0,25a^2-a-b^2+1 =0,25a2−a−b2+1=
(0,5a-1-b)(0,5a-1-b)(0,5a−1−b)(0,5a−1−b)
(0,5a-2+b)(0,5a-1-b)(0,5a−2+b)(0,5a−1−b)
(0,5a+1+b)(0,5a-1-b)(0,5a+1+b)(0,5a−1−b)
(0,5a-1-b)(0,5a-1+b)(0,5a−1−b)(0,5a−1+b)
115
317
Ответы на вопрос:
2х^2+5x -7=0
d=25+56=81
x=(-5+-9)/4
x=-7/2 x=1
3x^2-7x-8=0
d=49+96=145
x=(7+-корень145)/6
x=(7+корень145)/6; x=(7-корень145)/6
4x^2+4x+1=0
d=16-16=0
x=-4/8
x=-1/2
9x^2-6x+2=0
d=36-72=-36 корней нет
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