Question

Write the sum in standard form

E) 1(x)-m(x)

Answer 1

Answer:

Step-by-step explanation:

l(x) - m(x) = 5x² - 7y² + 4xy - [ -10x² + 9y² - 12xy + 4]

= 5x² - 7y² + 4xy  + 10x² - 9y² + 12xy - 4

= 5x² + 10x² - 7y² - 9y² + 4xy + 12xy - 4    {Combine like terms}

= 15x² - 16x² + 16xy - 4