Priya is simplying the expression-24-22)-3-22. Here is her work -214-22)-3-2x
-8-22-3-27
-11 - 4
a. Priya's work is incorrea Explain the error she made
b. Write an expression equivalent to 4x+3)– 12x + 5 that only has two terms.

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

Which expression is equivalent to 5a/4 - b/8 ?