Algebra

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Expand (5 - 2x) Squared

(5 - 2x) (5 - 2x)

5 sqrd + 5 X - 2x + -2x x 5 + -2x X -2x

so

5 Sqrd - 10x - 10x + 4X

= 5 sqrd + 4x

Am I right..thank you :-)

• Algebra -

No, you should use FOIL
F - multiply the Firsts
O - multiply the Outers
I - multiply the Inners
L - multiply the Lasts

so (5 - 2x) (5 - 2x)
= (5)(5) + (5)(-2x) + (-2x)(5) + (-2x)(-2x)
= 25 - 20x + 4x^2

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