factorise using the suitable identity 4x² +y² +25z² +4xy -10yz -20xz and hence evaluate for x=3 , y=2 and z =-2
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4x( y+x-2) y(y+4x-10z)
12(2+3-2) 2(2+12-20)
36-12
24
Step-by-step explanation:
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