Question

Answer 1

1: \(=16x^2+24x+9\)

5: \(=9x^2-24xy+16y^2\)

6: \(=4x^2-20xy+25y^2\)

7 \(=4x^2-\dfrac{1}{2}xy+\dfrac{1}{4}y^2\)

Answer 2

\(1,=16x^2+2.4x.3+9\\ 2=x^2+2.x.6y+36y^2\\ 3,=\left(x^2-1\right)\\ 4,=\left(x^2-\dfrac{4}{25}y^2\right)\\ 5,=9x^2-2.3x.4y+16y^2\\ 6,=4x^2-2.2x.5y+25y^2\\ 7,=4x^2-2.2x.\left(-\dfrac{1}{2}y\right)+\dfrac{1}{4}y^2\\ 8,=\left(\dfrac{x^2}{4}-4y^4\right)\\ 9,=\left(9x^4-16\right)\\ 10,=25x^2+2.5x.2y+4y^2+16x^2-2.4x.\left(-3y\right)+9y^2=41x^2+44xy+13y^2\)