Question

.HELP.АЛГЕБРА 7 КЛАСС​

Answer 1

Ответ:

Объяснение:

1. t² - 36 ≠ 0 ; t² ≠ 36 ; t ≠ ±6

2. $frac{7*4*a*a}{7*3*a} = frac{4a}{3}$

3. $frac{(2a-3b)^2}{2a-3b} = 2a-3b\\a=2, b=3, 2*2-3*3 = 4-9=-5$

4. a) $frac{1}{2a} + frac{1*2}{a*2} = frac{3}{2a}$

b) $frac{3}{3-y} - frac{y}{(y-3)(y+3)} = frac{3}{3-y} + frac{y}{(3-y)(y+3)} = frac{3*(y+3)}{(3-y)*(y+3)} + frac{y}{(3-y)(y+3)} = frac{4y+9}{(3-y)(y+3)}$

5. a) $frac{5*x*2*7*y}{7*y*5*3*x} = frac{2}{3}$

b) $frac{a*(a-b)}{b*(a+b)} * frac{6*(a+b)}{3*(a-b)} = frac{6*a*(a+b)*(a-b)}{3*b*(a+b)*(a-b)} = frac{2a}{b}$

Answer 2

точно правильно, да?