Question

como resolver
7x-(-2x + x) + (-3x + 5x)
5y² - (-4y² + 7y²) + (-y² + 9y² - 11y²)

Answer 1

a)

= 7x - (- 2x + x) + (- 3x + 5x)

= 7x - (- x) + (2x)

= 7x + x + 2x

= 8x + 2x

= 10x
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b)

= 5y² - (-4y² + 7y²) + (-y² + 9y² - 11y²)

= 5y² - (3y²) + (8y² - 11y²)

= 5y² - 3y² + (- 3y²)

= 2y² - 3y²

= - y²