Question

for the postive real number a nad b,which of the following is not true
a)√ab=√a×√b
b) (a+√b) (a-√b)=a^2-b
c)√a/b=√a/√b
d) (√a+b)(√a-√b)=a+b​

Answer 1

Answer:

d) (√a+√b)(√a-√b)=a+b

because,

(√a+√b)(√a-√b)= √a² - √b² = a-b

so d is false