√16a+√100a-√81a;(√99-√77)√11 спростыты вирази
√16a + √100a - √81a = 4√a + 10√a - 9√a = 5√a (√99 - √77) √11 = 11 (√9 - √7) = 11 ( 3 - √7) = 33 - 11√7