x² + 3xy - 10yx² - xy - 30y²
(x² - 10yx²) + (3xy - xy) - 30y²
x²(1 - 10y) + xy(3 - 1) - 30y²
x²(1 - 10y) + 2xy - 30y²
=> x² + 3xy - 10yx² - xy - 30y²
= x² - 30y² - 10y²x² + 2y
=] kurg lebih seperti ituu !!
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x² + 3xy - 10yx² - xy - 30y²
(x² - 10yx²) + (3xy - xy) - 30y²
x²(1 - 10y) + xy(3 - 1) - 30y²
x²(1 - 10y) + 2xy - 30y²
=> x² + 3xy - 10yx² - xy - 30y²
= x² - 30y² - 10y²x² + 2y
=] kurg lebih seperti ituu !!