The difference of -2x to the second power plus wx minus 4 and x to the second power plus 5x plush 6 equals negative 3x to the second power minus 10

(-2x)² + wx - 4 + (x)² + (5x + 6) = (-3x)² - 10

Simplify everything.

(-2x × -2x) + wx - 4 + x² + 5x + 6 = (-3x × -3x) - 10

Add / simplify like terms.

4x² + wx -4 + x² + 5x + 6 = 9x² - 10

Add like terms.

(4x² + x²) + 5x + wx + (-4 + 6) = 9x² - 10

Simplify.

4x² + 5x + wx + 2 = 9x² - 10

Get variables to one side.

So, subtract 2 from both sides.

4x² + 5x + wx = 9x² + (-10 + 2)

Then, subtract 9x² from both sides.

(4x² - 9x²) + 5x + wx = -8

Simplify.

-5x² + 5x + wx = -8

~Hope I helped!~