Maths with David

    23 May

    👉🏼Calculate 3 \frac{2}{5} \div 1 \frac{1}{3}

    👈🏼Which is smaller, (x + 5)2 or 2x2+10x+27 ?

    🖐🏼Without a calculator, calculate 36^{ \frac{3}{2} }

    👆🏼Prove that the product of two even numbers
    is always even.

    👇🏼If f(x) = \frac{4x+1}{7} , find f-1(x)

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