Question

ALGUÉM PODERIA ME AJUDAR E PRA AMANHÃ!!!
1°Calcule os produtos:

f)..(5x-2).(2x-1)
g)..(3x+1).(3x-1)
h)..(2x+5).(2x-5)
i)..(x+y).(x-y)
$j)..( {a}^{2} - 3.).( {a}^{2} + 3)$
k)..10+x).(10-x)
$l)..(6 {x}^{2} - 4).(6 {x}^{2} + 4)$
$m)..( {x}^{2} + 2).( {x}^{2} +6)$
$n)..( {m}^{4} - 1).( {m}^{4} - 5)$
$o)..( {x}^{3} - 2).( {x}^{3} + 8)$
p)..(ab-2y).(ab+2y)

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Answer 1

f) (5x-2).(2x-1) =

+10x²-5x-4x+2 =

+10x²-9x+2=

g) (3x+1).(3x-1) =

+9x²-1²

+9x²-1