Question

7) Dados os polinômios P= x²+y²-5xy e Q= 2x²+8xy-3y², determine:

a) P+Q

b) P-Q​

Answer 1

resposta:

P =

x ^{2} + y ^{2} - 5xyx2+y2−5xy

Q =

2x ^{2} + 8xy - 3y ^{2}2x2+8xy−3y2

a) P+ Q

(x ^{2} + y^{2} - 5xy) +( 2x^{2} + 8xy - 3y ^{2} )(x2+y2−5xy)+(2x2+8xy−3y2)

3x ^{2} - 2y ^{2} + 3xy3x2−2y2+3xy

b) P - Q

(x ^{2} + y ^{2} - 5xy) - (2x^{2} + 8xy - 3y^{2} )(x2+y2−5xy)−(2x2+8xy−3y2)

x ^{2} + y ^{2} - 5xy - 2 x ^{2} - 8xy + 3y^{2}x2+y2−5xy−2x2−8xy+3y2

- x ^{2} + 4y ^{2} - 13xy−x2+4y2−13xy

x ^{2} - 4y^{2} + 13xyx2−4y2+13xy

ESPERO TER AJUDADO