a) 16x mũ 2 -24xy+9y mũ 2 b) 2ab – b mũ 2 + 49-a mũ 2

a) 16x mũ 2 -24xy+9y mũ 2
b) 2ab – b mũ 2 + 49-a mũ 2

0 thoughts on “a) 16x mũ 2 -24xy+9y mũ 2 b) 2ab – b mũ 2 + 49-a mũ 2”

  1. a) `16x^2 – 24xy + 9y^2 = (4x)^2 – 2.4x.3y + (3y)^2 = (4x-3y)^2`

    b) `2ab-b^2+49-a^2 = 49 – (a^2-2ab+b^2)`

    `= 7^2 – (a-b)^2 = (7+a-b)(7-a-b)`

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