please help me guys please it's urgent
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Step-by-step explanation:
4(a) z-y
4(b) x+y/2
4(c) z * q = zq
5(a) 3mn-5mn+8mn-4mn
= 3mn+8mn-5mn-4mn
= 11mn - 9mn
= 2mn
5(b) t-8tz+3tz-z+z-t
= t-t-8tz+3tz-z+z
= -5tz
next questions solved by same method
6(a) -5y²+y²
= -4y²
next questions solved by same method
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