Question

помогите плиз!!!!!!!!!!!!!!!!!!!!!!!​

Answer 1

Объяснение:

1. ${x}^{7} \times {x}^{5} = {x}^{12}$
2. ${x}^{7} \div {x}^{5} = {x}^{2}$
3. $({ {x}^{7}) }^{5} = {x}^{35}$
4. $\frac{ ({ {x}^{3} )}^{6} \times {x}^{4} }{ {x}^{18} } = \frac{ {x}^{18} \times {x}^{4} }{ {x}^{18} } = \frac{ {x}^{22} }{ {x}^{18} } = {x}^{22 - 18} = {x}^{4}$

Answer 2

Ответ:

2)   -20m^7 * n^7.

Объяснение:

1.  1)   х^7*x^5=x^(7+5)=x^12;

2)  x^7 :x^5=x^(7-5)=x²;

3)   (x^7)^5=x^(7*5)=x^35;

4)  ((x^3)^6*x^4)/x^18=(x^18*x^4)/x^18=x^4.

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2.    -4m^3n^5 * 5n^2 * m^4=  -20m^3*m^4 * n^5*n^2= -20m^7 * n^7