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Multiply

Mathematics · Class 10

(ab)(cd)=ac/bd. Factor everything first so canceling is safe. x²-9x²+2x xx+3 becomes x-3x+2 after canceling x and (x+3).

factor first
times: ad/bc wait no - ac/bd
divide: times reciprocal
keep the ideas separate
Multiply: (ab)(cd)=ac/bd. Factor everything first so canceling is safe. x²-9x²+2x xx+3 becomes
WHAT — MULTIPLY: (ab)(cd)=ac/bd. Factor everything first so canceling is safe. x²-9x²+2x xx+3 becomes
HOW — Use the idea: Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check
CORE UNDERSTANDING: (ab)(cd)=ac/bd. Factor everything first so canceling is safe. x²-9x²+2x xx+3 becomes

Right triangle — Multiply — original sketch for this lesson (not copied from a textbook).