help me with these two
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Answer:
2)I) Simplify:(a+1)(2a-1)-(3a-1)(a+3),
So,
⇒(2a2-a+2a-1)-(3a2+9a-a-3)
⇒2a2-a+2a-1-3a2-9a+a+3
⇒- a2-7a+2
II) Simplify: (3b+2)(5b-4)-(b-5)(3b+2)
=>(3b+2)[(5b-4)-(b-5)]
=>(3b+2)(5b-4-b-5)
=>(3b+2)(4b+1)
=>3b(4b+1)+2(4b+1)
=>12b2+3b+8b+2
=>12b2+11b+2
Explanation:
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