Perfect square trinomial — Algebra I · Grade 9 or accelerated Grade 8, what it means and where it is taught
a2 ± 2ab + b2 = (a ± b)2.
Taught in Algebra I · Grade 9 or accelerated Grade 8.
Where it is taught
Practise this idea
1 question in the course bank use Perfect square trinomial, in Factoring.
Problem 1
Factor x2 - 14x + 49.
Worked answer
(x - 7)^2
49 = 72 and 2 × 7 = 14 ✓
(x - 7)2