Question

-25-x^2-2xy
Factorise this expression.

Answer 1

Step-by-step explanation:

Sin A = x/y

Since the hypotenuse is y

By Pythagoras theorem,

y²-x² = the length of the third side

Then cos A = Adjacent side/ hypotenuse

So , cos A = √y²-x²/y

Then, tan A = opp/ adjacent i.e, x/√y²-x²

Therefore, cos A × tan A = √y²-x²/y × x/√y²-x²

And we get x/y

Answer 2

Answer:

-25

$- 25 - x)2 \times 8 = 106$