Question

Va rog!Este urgent! ............​

Answer 1

a) $3xy ^{2} - 12y3x = 3xy ^{2} - 12xy ^{3}$

b) $4a ^{4} - 25b ^{2} = 2 ^{2} a ^{2} \times 2 - 5 ^{2} b ^{2}$

2²a²°² acolo așa trebuie după egal

$2 ^{2} \times (a ^{2} )^{2} - (5b) ^{2}$

$(2a ^{2} ) ^{2} - (5b) ^{2}$

$(2a ^{2} - 5b) \times (2a ^{2} + 5b)$

c) $z ^{2} y - 14xzy + 49x ^{2} y$

$y \times (z ^{2} - 14xz + 49x ^{2} )$

$y \times (z - 7x) ^{2}$

d) $x ^{2} a - 2x + a^{2} x - 2a$

$x \times (xa - 2) + a \times (ax - 2)$

$(xa - 2) \times (x + a)$

$(ax - 2) \times (x + a)$