Question

Solve : sec 4x = - 1

Answer 1

Answer:

$hi$

Step-by-step explanation:

Theory : A difference of two perfect squares, A2 - B2 can be factored into (A+B) • (A-B)

Proof : (A+B) • (A-B) =

A2 - AB + BA - B2 =

A2 - AB + AB - B2 =

A2 - B2

Note : AB = BA is the commutative property of multiplication.

Note : - AB + AB equals zero and is therefore eliminated from the expression.

Check : 1 is the square of 1

Check : s1 is not a square !!

Ruling : Binomial can not be factored as the difference of two perfect squares

Final result :

sec4x - 1