Question

Пж срочно нада розвязать всі з галочкой дам 40 балов срочно​

Answer 1

Ответ на фото.,...,-.-..-.-..-.

Answer 2

$154.\ \ 1)\ \ 14-14m^2=14\cdot (1-m^2)=14\cdot (1-m)(1+m)\\\\2)\ \ 3a-3a^3=3a(1-a^2)=3a(1-a)(1+a)\\\\\\155.\ \ 1)\ \ a^2-2ab+b^2-25=(a-b)^2-5^2=(a-b-5)(a-b+5)\\\\2)\ \ x^2-16b^2+8bc-c^2=x^2-(4b-c)^2=(x-4b+c)(x+4b-c)$

$156.\ \ 1)\ \ 7x^3-63x=0\ \ ,\ \ 7x(x^2-9)=0\ \ ,\\\\7x(x-3)(x+3)=0\\\\x_1=0\ ,\ x_2=3\ ,\ x_3=-3\\\\2)\ \ 49x^3-14x^2+x=0\ \ ,\ \ \ x\cdot (49x^2-14x+1)=0\ \ ,\\\\x\cdot (7x-1)^2=0\\\\x_1=0\\\\7x-1=0\ \ ,\ \ \ x_2=\dfrac{1}{7}\\\\3)\ \ x^3-5x^2-x+5=0\ \ ,\ \ \ x^2(x-5)-(x-5)=0\ \ ,\\\\(x-5)(x^2-1)=0\ \ ,\ \ \ (x-5)(x-1)(x+1)=0\ \ ,\\\\x_1=5\ ,\ x_2=1\ ,\ x_3=-1$