A(x) = x³ + 2x² + 2x³ - 5x + x² + 3
B(x) = 4x² + 3x³ - 2x - 2x² - 3x + 19
a, Thu gọn đa thức...
Mathematics, 22.07.2021 06:10, angie0000
A(x) = x³ + 2x² + 2x³ - 5x + x² + 3
B(x) = 4x² + 3x³ - 2x - 2x² - 3x + 19
a, Thu gọn đa thức A, B và tìm hệ số cao nhất, hệ số tự đó của A, B
b, Tìm đa thức D(x) = B(x) + A(x), tính D(-1)
c, Tìm nghiệm của H(x) biết H(x) = B(x) - A(x)
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