2,1a²b²c⁴(-10/7)bc³d=-3a²b³c⁷d;
2)V=3ab²*2ab*4a²b⁵=24a⁴b⁸;
<span>x^8*x^2 = x^10
x^8/x^2 = x^6
(x^8)^2 = x^16
(x^4)^5*x^2 = x^20*x^2 = x^22
x^12 = x^12</span>
√28=2*√7.
√99=3*√11.
√75=5*√3.
√52= 2*√13.
--------------------
6*√2=√72.
5*√6=√150.
2*√7=√28
3*√11=√99.
<span>log_5 (4x + 5) = 2+ log_5 (x - 4)
</span>log_5 (4x + 5) = log_5 (25) + log_5 (x - 4)
log_5 (4x + 5) = log_5[ (25) * (x - 4)]
4x + 5 = (25) * (x - 4)
4x - 25x = -100 - 5
- 21x = - 105
x = 5