please solve these questions
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Step-by-step explanation:
this may help you please follow me and give thanks and mark as brainlist..
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I'm just answering 1st one
Step-by-step explanation:
(5x+7)(3x+4)
= 5x(3x+4)+7(3x+4)
=5x*3x+5x*4+7*3x+7*4
=15x^2+20x+21x+28
=15x^2+(20+21)x+28
=15x^2+41x+28
* means mutiply and x^2=x*x
if you would understand this solution then u can solve the others very easily
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