Question

помогите пожалуйста!очень надо!

Answer 1

1. 5*x^2  + 3*x при х = 3
5*3*3 + 3*3 = 9(1+5) = 9*6 = 54
2. 1(x^2-y^2) *(x - y)2 при x = 4, y = 1
1(4*4 - 1*1) * (4 - 1)2 =
330 = 110
3. 216 * 564 = 2*516*64 = 516*32 = 5512

Answer 2

$1)5 x^{2} +3x=x*(5x+3) \ x=3 \ 3*(5*3+3)=3*(15+3)=3*18=54 \ \ 2) (frac{1}{ x^{2} -y ^{2} } )* frac{x-y}{2} = frac{1}{(x-y)(x+y)} * frac{x-y}{2} = frac{x-y}{(x-y)(x+y)*2} = frac{1}{2(x+y)} \ x=4,y=1 \ frac{1}{2*(4+1)} = frac{1}{2*5} = frac{1}{10} =0.1 \ \ 3) frac{2}{16} * frac{5}{64} = frac{1}{8} * frac{5}{64} = frac{5}{8*64} = frac{5}{512}$