Question

Представьте в виде многочлена выражение: (5x4+0,7y3)(5x4−0,7y3)

Answer 1

5x4+0,7y3)(5x4−0,7y3)
(20+2.1у)(20-2.1у)
400-2.1²*y²
400-(21/20)²*y²
400-441/100y²

Answer 2

$(5 {x}^{4} + 0.7 {y}^{3} )(5 {x}^{4} - 0.7 {y}^{3} ) = \\ = {(5 {x}^{4} )}^{2} - {(0.7 {y}^{3} )}^{2} = \\ = 25 {x}^{8} - 0.49 {y}^{6}$