Question

A) (a^2+5a+4)-(a^2+5a-4) B) (x^2-a)*(x^2+a) G) (5x-1)^2-25x^2

Answer 1

А) = а²+5а+4-а²-5а+4 = 8
В) = (х²)²-а² = х^4 -а²
G) = 25х²-10х+1-25х²=1-10х

Answer 2

спс