Which are the solutions of the quadratic equation x^2=7x+4

x^2 = 7x + 4

Subtract x^2 from both sides.

-x^2 + 7x + 4

Multiply all terms by -1.

x^2 - 7x - 4

Check if splitting the middle term is possible:

List factors of -4:

1 * -4

-1 * 4

2 * -2

None of the factors fit the criteria.

We can solve using the quadratic formula:

7 +/- √(49 + 16)/2

7 +/- √65/2

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.