𝑎^2 − 𝑏^2 − 4𝑎𝑐 + 4𝑐^2
𝑎^2 − 𝑏^2 − 4𝑎𝑐 + 4𝑐^2
We can write it as
= 𝑎^2 − 4𝑎𝑐 + 4𝑐^2 − 𝑏^2
So we get
= 𝑎^2 − 2 × 𝑎 × 2𝑐 + 2𝑐^2 − 𝑏^2
= (𝑎 − 2𝑐)^2 − 𝑏^2
Based on the equation 𝑎^2 − 𝑏^2 = (𝑎 + 𝑏)(𝑎 − 𝑏)
We get,
= (a – 2c + b) (a – 2c – b)
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