Question

1) (8√5+2√3)√5-√60-402) cosa/1-sina- cosa/1+sina3) 9/3-2√2 избавится от иррациональности4) x^2+7x+6/3x^2помогите!! ПОЖАЛУЙСТАААА!!!! срочноо

Answer 1

что нужно сделать в четвертом?

Answer 2

1) To simplify the expression (8√5+2√3)√5-√60-40, we can follow these steps:

First, let's simplify the expression inside the parentheses: 8√5 + 2√3

Next, let's simplify the expression √60: √60 = √(4 * 15) = 2√15

Now, let's substitute the simplified expressions back into the original expression: (8√5 + 2√3)√5 - √60 - 40 = (8√5 + 2√3)√5 - 2√15 - 40

2) For the expression cosa/1-sina - cosa/1+sina, we can simplify it using the formula for the difference of squares:

cosa/1-sina - cosa/1+sina = (cosa(1+sina) - cosa(1-sina)) / (1-sina)(1+sina) = (cosa + cosa*sina - cosa + cosa*sina) / (1 - sina^2) = 2cosa*sina / cos^2a

3) To simplify the expression 9/3 - 2√2, we can perform the division and simplify the square root:

9/3 - 2√2 = 3 - 2√2

4) To eliminate the irrationality in the expression x^2 + 7x + 6/3x^2, we can factor the numerator and denominator:

x^2 + 7x + 6 = (x + 6)(x + 1) 3x^2 = 3(x^2)

Now, we can simplify the expression: (x + 6)(x + 1) / 3(x^2)

Please let me know if you need further assistance!