Expand the expression (2a-4)(5a-7)

 Exercise

$\left(2a-4\right)\left(5a-7\right)$

 

Multiply the single term $5a-7$ by each term of the polynomial $\left(2a-4\right)$

$2a\left(5a-7\right)-4\left(5a-7\right)$

 

Multiply the single term $2a$ by each term of the polynomial $\left(5a-7\right)$

$10a\cdot a-14a-4\left(5a-7\right)$

 

When multiplying two powers that have the same base ($a$), you can add the exponents

$10a^2-14a-4\left(5a-7\right)$

 

Multiply the single term $-4$ by each term of the polynomial $\left(5a-7\right)$

$10a^2-14a-20a+28$

 

Combining like terms $-14a$ and $-20a$

$10a^2-34a+28$

$10a^2-34a+28$

 Try other ways to solve this exercise

Can't find a method? Tell us so we can add it.