А) (13-2а)(2а+13) = (13-2а)(13+2а) =13²-(2а)²= 169 - 4а²
б) (3х+5)(5-3х) = (5+3х)*(5-3х)= 5²-(3х)²= 25- 9х²
в) (4m⁴-1)(4m⁴+1)= (4m⁴)² - 1² = 16 m ⁸ -1
г) (7х³+2) (7х³-2) = (7х³)²- 2²= 49х⁶ - 4
д) (-2а⁵+3) (2а⁵+3)= (3-2a⁵)( 3+2a⁵)= 9 - 4а¹⁰
е) (5с³-4) (4+5с³) = 25 с ⁶- 16
ж) (2а²+3b²)(3b²- 2a²)= (3b²+2a²) (3b²-2a²) = 9b⁴-4a⁴
p) (-6р - 5 q⁵)( 6р-5q⁵) =-1 * ( 6p+5q⁵)( 5q⁵- 6р) =
=-1*( 25q¹⁰-36 p²) = 36 p² -25q¹⁰