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Experimental Techniques

question 1 of 3 Grade: Ten - G10

Q: Which technique separates sand from salt?

Did You Know?

To factorise \(3w^2 - 12\), first factor out the common factor of 3: \(3(w^2 - 4)\). Then recognise that \(w^2 - 4\) is a difference of two squares: \(w^2 - 2^2\). Using the formula \(a^2 - b^2 = (a + b)(a - b)\), we get \((w + 2)(w - 2)\). Therefore, the complete factorisation is \(3(w + 2)(w - 2)\).

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Did You Know?

To factorise \(3w^2 - 12\), first factor out the common factor of 3: \(3(w^2 - 4)\). Then recognise that \(w^2 - 4\) is a difference of two squares: \(w^2 - 2^2\). Using the formula \(a^2 - b^2 = (a + b)(a - b)\), we get \((w + 2)(w - 2)\). Therefore, the complete factorisation is \(3(w + 2)(w - 2)\).

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