Step 1
Pascal's Triangle
Tap a dashed circle to sum the two numbers above it.
Pattern complete!
Step 2
Drag Coefficients
Use Pascal's row {{ s2_n }} to expand the binomial.
{{ term.filled }}
+
{{ d.val }}
Step 3
Build the Term
Assemble the general term formula.
Find the term with in
Combination
(
{{ s3_p1 }}
)
×
(
{{ s3_p2 }}
)
Term Built Correctly!
Hint: The exponents must add up to {{ s3_n }}
Step 4
Calculate Coefficient
Evaluate the term to find the final number.
Find the coefficient of in
= ?
{{ s4_input || '_' }}
Mastered!
You've learned how to connect Pascal's Triangle to binomial expansions and build general terms perfectly.