UPSKILL MATH PLUS
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Learn moreExpand the following:
(i) (3a – 7b – c)^2=
(ii) (–2x + 5y – 3z)^2=
(iii) (\frac{1}{4} a-\frac{1}{2}b+1)^2
Answer variants:
9a^2 + 49b^2 + c^2 – 42ab + 14bc – 6ca
9a^2 + 49b^2 + c^2 – 21ab + 7bc – 3ca
4x^2 + 25y^2 + 9z^2 – 20xy + 30yz -12zx
\frac{1}{16}a^2 + \frac{1}{4}b^2 + 1 + \frac{1}{4}ab – b + \frac{1}{2}a
\frac{1}{16}a^2 + \frac{1}{4}b^2 + 1 – \frac{1}{4}ab – b + \frac{1}{2}a
4x^2 + 25y^2 + 9z^2 – 20xy – 30yz + 12zx