How do you simplify `(5x^2 + 3x + 4) + (5x^2 + 5x − 1)`?

Related questions

• What is an example of an expression with one or more variables?
• How do you write expressions with one or more variables?
• How do you evaluate expressions when you have more than one variables?
• How do you evaluate the expression `3a+2b` for `a=1` and `b=-2`?
• How do you find the area of a triangle whose base is 2 inches and height is 4.5 inches?
• How do you find the volume of a sphere whose radius is 2?
• How do you evaluate the expression `2(x-y)` for `x=1` and `y=-2`?
• How do you evaluate `x^2+2x-1` when `x=2`?
• What is the value of `(3x+8y)/(x-2y)` if `x/(2y)=2`?
• How do you simplify `6-4t-4`?