13_ A = (Y+3)(Y-7)
= Y²-7Y+3Y-21
= Y²-4Y-21
B= (2x-1)(x+5)
= 2x²+10x-x-5
=2x²+9x-5
14- A = (v-8)(v-2)
=v²-2v-8v+16
=v²-10v+16
B= (3x-7)(2x-5)
=6x²-15x-14x+35
=6x²-29x+35
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13_ A = (Y+3)(Y-7)
= Y²-7Y+3Y-21
= Y²-4Y-21
B= (2x-1)(x+5)
= 2x²+10x-x-5
=2x²+9x-5
14- A = (v-8)(v-2)
=v²-2v-8v+16
=v²-10v+16
B= (3x-7)(2x-5)
=6x²-15x-14x+35
=6x²-29x+35