Is this laptop good enough for softwares like corel and illustrator/photoshop?

I don't like that laptop. It has things to fool people who do not understand the details.
The i7-6500U dual core CPU has Intel® HD Graphics 520
They added an entry level graphics card AMD Radeon R5 M335 4GB DDR3
The graphics ram is the cheaper DDR3 as same as the system ram, and an R5 M335 doesn't need any more than 2GB as that is enough to saturate it.
The Intel 520 is #296 and the R5 M335 is #290. There's almost zero difference.
http://www.notebookcheck.net/...849.0.html

http://www.videocardbenchmark.net/gpu_list.php
Radeon R5 M335 score 594
HD 520, a higher score 781
And this also has it below the HD 520
http://www.game-debate.com/...520-mobile

So, certainly, the graphics card in it is a total waste of money.

Resolution is 15.6-inch LED Backlit Display with Truelife and HD resolution (1366 x 768)
Making it inferior to a 1920x1080 for someone who does graphics.
It is only an Inspiron, which puts it in generic laptop category.
Ethernet is the lower grade 10/100 instead of gigabit.

That laptop is a piece of junk/trash/rubbish for your purposes and is crazy at P 47,988.00

I showed you a great choice at P 49,992.00
http://www.villman.com/Product-Detail/MSI_GP62_6QE_294PH
Better everything about it.
Better brand, much better display, better CPU ( i7-6500U @ 2.50GHz4346 vs i5-6300HQ @ 2.30GHz5697)
http://www.cpubenchmark.net/...u_list.php
Much better graphics processor as well over 2x as strong, HDD better than or equal to, better keyboard, better audio
The only thing the Dell is better on is its weight.

And the Yoga is better than the Dell for your use
http://www.villman.com/Product-Detail/Lenovo_80N60007PH

Maybe look at this seller:
http://www.lazada.com.ph/

Essentially, you must use the data tables. Both the MSI and Asus you showed before are better than this Dell overpriced system. They are wrong also though. You should have a top performing display-LCD to do graphics software.