exam Maths Puzzle Numerical Ability

Given -x to the third power + x to the second power + 3x + 4 find
f(�1), f(0), and f(1)

please help i am a little confused on what exactly to find

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exam Other Question

the perimeter of rectangle 240 cm. its length is decreased by 10% & its breadth increased by 20 we get the same perimeter find the length & breadth of rectangle jerry spent 2.5 h biking up mount lowe, rested at the top for 30 min, and biked down in 1.5 hr. how far did he bike if his rate of ascent was 3 km/h less than his rate of descent?