Question

aplique a regra do quadrado da soma de dois termos e calcule , me ajudemmmm !!!

Answer 1

a)

(x + 9)² =

(x + 9) (x + 9) =

x(x + 9) + 9(x + 9) =

x² + 9x + 9x + 9² =

x² + 18x + 81

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b)

(6a + 1)² =

(6a + 1)(6a + 1) =

6a(6a + 1) + 1(6a + 1) =

36a² + 6a + 6a + 1² =

36a² + 12a + 1

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c)

(y + 1,8)² =

(y + 1,8) (y + 1,8) =

y(y + 1,8) + 1,8(y + 1,8) =

y² + 1,8y + 1,8y + (1,8)² =

y² + 3,6x + 3,24

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d)

(x³y² + 5x)² =

x³y²(x³y² + 5x) + 5x(x³y² + 5x) =

(x³ . x³)(y² . y²) + 5y² . (x . x³) + 5y²(x . x³) + (5x)² =

x⁶ . y⁴ + 5y² . x⁴ + 5y² . x⁴ + 25x² =

x⁶y⁴ + 10x⁴y² + 25x²