napisz wzór na różnice kwadratów wyznacz 4do potegi2-x potegi2
a^2 - b^2 = (a+b)*(a-b)
4^2 - x^2 = (4-x)*(4+x)
a² - b² = (a - b)(a + b)
4² - x² = (4 - x)(4 + x) = 16 + 4x - 4x - x² = 16 - x²
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a^2 - b^2 = (a+b)*(a-b)
4^2 - x^2 = (4-x)*(4+x)
a² - b² = (a - b)(a + b)
4² - x² = (4 - x)(4 + x) = 16 + 4x - 4x - x² = 16 - x²