Question

1- calcule os monômios a seguir: A) 8x³+4x³= B) 17ab-6ab= C) 4x+y= D) 3a²b²-4a²b²= E) 3/7x²+2/7x²= F) 4/5 xy -1/3 xy= G)(7a).(2b)=. Cálculos e respostas

Answer 1

A) 8x³ + 4x³ = 12x³
...........
B) 17ab - 6ab = 11ab
.................
C) 4x + y = 4x + y
.................
D) 3a²b² - 4a²b² = -a²b²
.................
E) 3/7x² + 2/7x² = (3+2)x²/7 = 5/7x²
.................
F) 4/5 xy - 1/3 xy = MMC (5,3) = 15
(4.3)/15xy - (5.1)/15xy = 12/15xy -5/15xy = 7/15xy
..................
G)(7a).(2b) = 14ab

Answer 2

A) $8x^3+4x^3=(8+4)x^3=\boxed{12x^3}$

B) $17ab-6ab=(17-6)ab=\boxed{11ab}$

C) $4x+y=\boxed{4x+y}$

D) $3a^2b^2-4a^2b^2=(3-4)a^2b^2=-1a^2b^2=\boxed{-a^2b^2}$

E) $\dfrac{3}{7}x^2+\dfrac{2}{7}x^2=\left(\dfrac{3}{7}+\dfrac{2}{7}\right)x^2=\boxed{\dfrac{5}{7}x^2}$

F) $\dfrac{4}{5}xy-\dfrac{1}{3}xy=\left(\dfrac{4}{5}-\dfrac{1}{3}\right)xy=\boxed{\dfrac{7}{15}xy}$.

G) $(7a)(2b)=(7\cdot2)ab=\boxed{14ab}$