What is the right answer ? Algebra Expressions, Equations, and Functions Variable Expressions 1 Answer Tom M. Mar 3, 2018 #4x^2-7x+16# Explanation: Let's expand the quadratic. #color(red)((x+4)^2)color(blue)(+3x(x-5))=color(red)(x^2+8x+16)color(blue)(+3x^2-15x)# Add like terms #color(green)(x^2)+color(purple)(8x)+16+color(green)(3x^2)color(purple)(-15x)=color(green)(4x^2)color(purple)(-7x)+16# #=E# Answer link Related questions How do you write the variable expression for: a quotient of 2 and the sum of a number and 3 ? What are variables? What are variable expressions? How do you write variable expressions? How do you evaluate variable expressions? How do you simplify the expression #3x-x+4#? How do you write a quotient of a number and 6 as an expression? How do you evaluate the expression #2x+1# for #x=1#? How do you write a product of a number and 2 as an expression? How do you write 5 less than 2 times a number as a variable expression? See all questions in Variable Expressions Impact of this question 1419 views around the world You can reuse this answer Creative Commons License