V = 3b + 2b^2V=3b+2b2 What is the value of V when b = –4? Algebra Expressions, Equations, and Functions Variable Expressions 1 Answer Steve M Oct 29, 2016 V = 3b + 2b^2 V=3b+2b2 So when b=-4 b=−4 we have; V = 3(-4) + 2(-4)^2 V=3(−4)+2(−4)2 :. V = -12 + 2(-4)(-4) :. V = -12 + 2(16) :. V = -12 + 32 :. V = 20 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 3572 views around the world You can reuse this answer Creative Commons License