4) Factorise completely a) 90g +45 b)20-10s c)pq+2p+12p d)15+10b+55c
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4) Factorise completely a) 90g +45 b)20-10s c)pq+2p+12p d)15+10b+55c
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a) 90g+45=45*2g+45
Taking 45 as the common factor, we get 45(2g+1) which is the required answer.
b) Taking 10 as the common factor, we get 10(2-s) which is the required answer.
c) First we combine the like terms to get pq+14p, and then taking p as the common factor, we get p(q+14), which is the required answer.
d) Taking 5 as the common factor, we get 5(3+2b+11c), which is the required answer.
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