can anyone solve this??
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Answer:
download the app photo maths and scal it or use snapscan application
(a) 7x^2 + 11xy - 7 - 5 - 35x^2
= -17x^2 - 12xy + 3
(b) -a^3 + ab -b^2 +7ab y-16ab +a^3 - 36b^2
= - 8ab - 37b^2
( Hope it helps )