Question

can anybody tell the answer please​

Answer 1

Answer:

s^2+t^2+2st-4st

s^2+t^2-2st

Answer will be zero or 0

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Answer 2

Answer:

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Step-by-step explanation:

(s+t)2−4st

Use binomial theorem (a+b)2=a2+2ab+b2 to expand (s+t)2.

s2+2st+t2−4st

Combine 2st and −4st to get −2st.

s2−2st+t2

ok