nightwolf10 nightwolf10 22-01-2019 Mathematics contestada please help me multiply (4x^2+7x)(5x^2-3x) a. 20^4+23x^3-21x^2 b.20x^4+35x^2-21x c.20x^4+35x^3-21x^2 d.20x^4+23x^2-21x