What is expand (1.2a-4b)^2 ?

The solution to expand (1.2a-4b)^2 is 1.44a^2-9.6ab+16b^2

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expand (1.2a-4b)^2

expand

(1.2 a - 4 b)^{2}

1.44 a^{2} - 9.6 ab + 16 b^{2}

Solution steps

(1.2 a - 4 b)^{2}

Apply Perfect Square Formula:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(1.2 a - 4 b)^{2} = (1.2 a)^{2} - 2 \cdot 1.2 a \cdot 4 b + (4 b)^{2}

= (1.2 a)^{2} - 2 \cdot 1.2 a \cdot 4 b + (4 b)^{2}

Simplify

(1.2 a)^{2} - 2 \cdot 1.2 a \cdot 4 b + (4 b)^{2} : 1.44 a^{2} - 9.6 ab + 16 b^{2}

= 1.44 a^{2} - 9.6 ab + 16 b^{2}

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What is expand (1.2a-4b)^2 ?
The solution to expand (1.2a-4b)^2 is 1.44a^2-9.6ab+16b^2