Expand the following expressions: ${{\left( x+y \right)}^{2}}$ ${{\left( x-y \right)}^{2}}$ Usin

Question

Expand the following expressions: ${{\left( x+y \right)}^{2}}$ ${{\left( x-y \right)}^{2}}$ Using the answers in part (a), if ${{x}^{2}}+{{y}^{2}}=25$ and $4xy=16$, calculate the value of ${{\left( x+y \right)}^{2}}$ ${{\left( x-y \right)}^{2}}$

Accepted Answer

(a)(i) $x^2+2xy+y^2$ (a)(ii) $x^2-2xy+y^2$ (b)(i) $33$ (b)(ii) $17$

IP2U3 Exercise 1 Q19

IP2U3 Exercise 1 Q19

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