Question

vi) $xy + yz + zx$
vii) $\frac{ {x}^{2} - 2 {y}^{2} + {z}^{2} }{3}$
viii) $8a \div 9b - {2a}^{2} \times {b}^{2}$
ix) ${7x}^{2} + \frac{2 {y}^{2} + 1}{5}$

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Answer 1

Step-by-step explanation:

tex]xy + yz + zx[/tex]

vii) $\frac{ {x}^{2} - 2 {y}^{2} + {z}^{2} }{3}$

viii) $8a \div 9b - {2a}^{2} \times {b}^{2}$

ix) ${7x}^{2} + \frac{2 {y}^{2} + 1}{5}$

vii) $\frac{ {x}^{2} - 2 {y}^{2} + {z}^{2} }{3}$

viii) $8a \div 9b - {2a}^{2} \times {b}^{2}$

ix) [tex] {7x}^{2} + \frac{2 {y}^{2} + 1}{5}