Question

Tentukan hasil dari pengurangan :
a. 5m^2 - 2n + 3 dari -2 (-m^2 + m -4)
b. 3(2p^2 - 3) dari 2(4p^2 - 9)

Answer 1

A) -(-m²+m-4)-(5m²-2n+3)
= m²-m+4-5m²+2n-3
=m²-5m²-m+2n +4-3
= -4m²-m+2n+1

b) 2(4p²-9)-(3(2p²-3)
= 8p²-18-(6p²-9)
= 8p²-18-6p²+9
= 8p²-6p²-18+9
= 2p²-9