3) Pedro y Matilde fueron a un centro comercial en busca de zapatillas para cada una de sus hijas. Si el precio unitario es de 123 soles, y Pedro al abrir su billetera observa que solo tiene un billete de 100 dólares y un billete de 20 soles. ¿Cuánto dinero en soles le quedará, si se sabe que el cambio esta 3. 6?

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents

77

step-by-step explanation:

answer4 to the second power is 16

and 4 to the third power is 64,