hetvetp4wn71 A) x^2+5x-8x-40 = x^2 - 3x - 40
b) 12b^2 - 6b -8b - 4 = 12b^2 -14b - 4
в) 12a^2 - 18ax + 2ax - 3x^2 = 12a^2 - 16ax - 3x^2
г) c^3+3c^2+2c+c^2+3c+2 =c^3 + 4c^2 +5c +2
2.
a) (x-1)(2x-3)
b) a(b+c) + 4(b+c) = (b+c)(a+4)

3.
(-0,8a^3 - 1,2a)(5-3a^2) = -4a^3 +2,4a^5 - 6a + 3,6a^3 = 2,4a^5 - 0,4a^3 - 6a = a(2,4a^4 - 0,4a^2 - 6)

4. a(a+b) - 3(a+b) = (a+b)(a-3)
k(p-c) - x(p-c) - (p-c) = (p-c)(k-x-1)

5. (a-2)(a-3) = a^2-24
a^2-3a-2a+6 = a^2 - 24
-6a = -30
a = 5 см