Evaluate
\frac{\left(4b-15t\right)^{2}}{16}-5t+8
Expand
-\frac{15bt}{2}+\frac{225t^{2}}{16}+b^{2}-5t+8
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b^{2}-\frac{15}{2}bt+\frac{225}{16}t^{2}+8-5t
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(b-\frac{15}{4}t\right)^{2}.
b^{2}-\frac{15}{2}bt+\frac{225}{16}t^{2}+8-5t
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(b-\frac{15}{4}t\right)^{2}.
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