Simplify 2a(a-5)+4(a-5)

$2 a (a - 5) + 4 (a - 5)$

Simplify each term.

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Apply the distributive property.

$2 a \cdot a + 2 a \cdot - 5 + 4 (a - 5)$

Multiply $a$ by $a$ by adding the exponents.

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Move $a$ .

$2 (a \cdot a) + 2 a \cdot - 5 + 4 (a - 5)$

Multiply $a$ by $a$ .

$2 a^{2} + 2 a \cdot - 5 + 4 (a - 5)$

Multiply $- 5$ by $2$ .

$2 a^{2} - 10 a + 4 (a - 5)$

Apply the distributive property.

$2 a^{2} - 10 a + 4 a + 4 \cdot - 5$

Multiply $4$ by $- 5$ .

$2 a^{2} - 10 a + 4 a - 20$

Add $- 10 a$ and $4 a$ .

$2 a^{2} - 6 a - 20$

Simplify 2a(a-5)+4(a-5)

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