Practice problem
Simplify −3x3(4x7).-3x^3(4x^7).−3x3(4x7).
−12x21-12x^{21}−12x21
−12x10-12x^{10}−12x10
x21x^{21}x21
x10x^{10}x10
Type a concept, like “slope” or “photosynthesis”.