Răspuns:
a)
[tex]a) x \times {a }^{2} + y \times {a}^{2} - x \times {b}^{2} + y \times {b}^{2} \ \\ [/tex]
[tex]b)a \times x \times x + b \times x \times x - a \times y \times y - b \times y \times y[/tex]
[tex]c) {7}^{2} \times a \times a + 14a \times 2x + 14a \times 1 + 4 {x}^{2} + 2x + 1[/tex]
[tex]d) (\sqrt{3} ) {}^{2} - {x}^{2} + 6 \times \sqrt{3} - 6 \times x + 9[/tex]
Sper sa fie bine!!
