Question

Calcule:

(a+4b)²

(2xy+3x)²

(2k-3)²

(5x-3b)²

(2xy+2b)•(3xy-4)

(xa+3a)•(2xy-2b)

Answer 1

(a+4b)² = a^2 + 8ab + 16b^2

(2xy+3x)²  = 4x^2y^2 + 12x^2y + 9x^2

(2k-3)²  = 4k^2 - 12k + 9

(5x-3b)²  = 25x^2 - 30bx + 9b^2

(2xy+2b)•(3xy-4)  = 6x^2y^2 - 8xy + 6bxy - 8b

(xa+3a)•(2xy-2b) = 2ax^2y - 2abx + 6axy - 6ab

Answer 2

Resposta:

Explicação passo-a-passo:

a) a²+2.a.4b+(4b)²

a²+8ab+16b²

b) (2xy)²+2.2xy.3x+(2x)²

4xy²+12x²y+4x²

c) (2k)²-2.2k.3+3²

4k²-12k+9

d) (5x)²-2.5x.3b+(3b)²

25x²-30xb+9b²

e) +6x²y²-8xy+6xyb-8b

f) 3ax²y-3xab+6xya-6ab