Question 352049
Use the distributive property,
{{{(y^2-4)(4y^2-5y+4)=y^2(4y^2-5y+4)-4(4y^2-5y+4)}}}
{{{(y^2-4)(4y^2-5y+4)=(4y^4-5y^3+4y^2)-(16y^2-20y+16)}}}
{{{(y^2-4)(4y^2-5y+4)=4y^4-5y^3+4y^2-16y^2+20y-16)}}}
{{{highlight((y^2-4)(4y^2-5y+4)=4y^4-5y^3-12y^2+20y-16))}}}