Question

3(x-1)² - (x + 2)² = 2(x – 5)² – 21​

Answer 1

Answer:

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Step-by-step explanation:

3(x^2+1-2x) - (x^2+4+4x)=2(x^2+25-10x) -21

3x^2+3-6x-x^2-4-4x=2x^2+50-20x-21

10x=30

x=3

Answer 2

Answer:

x=3

Step-by-step explanation:

3(x-1)² - (x + 2)² = 2(x – 5)² – 21

3x^2-6x+3-x^2-4x-4=2x^2-20x+50-21

10x=30

x=3