Х(2х+72)=0
х=0 или 2х+72=0
х= - 72/2
х= -36
ответ 0, -36
Равно 49 Надеюсь поймёшь что есть что ррошшподдпрлдмрол
√ (3x^2 + 6x + 1) = 7 - x
3x^2 + 6x + 1 = x^2 - 14x + 49
2x^2 + 20x - 48 = 0 /:2
x^2 + 10x - 24 = 0
D= 100 + 4*24 = 100 + 96 = 196
x1 = ( - 10 + 14)/2 = 4/2 = 2
x2 = ( - 10 - 14)/2 = - 24/2 = - 12
152. 1) (5m-2n)/10k : (5m-2n)/10k^2 = (5m-2n)/10k * 10k^2/(5m-2n) = k
2) (p+3)/(p^2-2p) : (p+3)/(4p-8) = (p+3)/p(p-2) * (4(p-2))/p+3 = 4/p
3) (a^2-b^2)/2ab : (a+b)/ab = ((a-b)(a+b))/2ab * ab/(a+b) = (a-b)/2
4) 18b/(b^2-16) * (b+4)/3b = (6*3b)/(b-4)(b+4) * (b+4)/3b = 6/(b-4)
5) 6/(m^2-9n^2) * (m-3n) = 6/((m+3n)(m-3n)) * (m-3n) = 6/(m+3n)
6) (3c-9)/(9c^2+6c+1) * (3c+1)/(c-3) = (3(c-3))/(3c+1)^2 * (3c+1)/(c-3) = 3/(c+3)