(2a-1)(8a-5)
Apply the distributive property.
2a(8a-5)-1(8a-5)
Apply the distributive property.
2a(8a)+2a⋅-5-1(8a-5)
Apply the distributive property.
2a(8a)+2a⋅-5-1(8a)-1⋅-5
2a(8a)+2a⋅-5-1(8a)-1⋅-5
Simplify each term.
Multiply a by a.
2⋅8a2+2a⋅-5-1(8a)-1⋅-5
Multiply 2 by 8.
16a2+2a⋅-5-1(8a)-1⋅-5
Multiply -5 by 2.
16a2-10a-1(8a)-1⋅-5
Multiply 8 by -1.
16a2-10a-8a-1⋅-5
Multiply -1 by -5.
16a2-10a-8a+5
16a2-10a-8a+5
Subtract 8a from -10a.
16a2-18a+5
16a2-18a+5
Multiply (2a-1)(8a-5)