Question

c) (4x)²+(21x⁹):(-3x⁷)
d) (3x²) (-2x) -( - 2x)³​

Answer 1

$c) (4x)²+(21x⁹):(-3x⁷) \\ {16x}^{2} - {7x}^{2} \\ {9x}^{2}$

$d) (3x²) (-2x) -( - 2x)³ \\ - {6x}^{3} - ( - 8 {x}^{3} ) \\ - {6x}^{3} + 8 {x}^{3} \\ {2x}^{3}$