Expand the following quadratic expression: (2x+4)(x-5)

Multiply the first terms in both brackets:2xx= 2x²
Next multiply the first term of the first bracket and the second term of the second bracket:2x-5= -10x
Multiply the second term of the first bracket with the first term of the second bracket:4x= 4x
Multiply the second terms of both brackets:4-5= -20
So now there is the expression: 2x²-10x+4x-20Add up the two 'x' terms to get the final quadratic: 2x²-6x-20