exam Maths Puzzle Numerical Ability

Find the x-intercepts. Express your answer as an ordered pair. y = x^2 - 7x - 10

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exam Other Question

(8x (x to the 2 power) + 8x-2)-(8x (x to 2nd power) +5) = 6x+2. Can you explain..pretty new with computer and math. Going back to school. Im stumped..please help 1. find the product
(2x+5y)^4

I know that it is
1 4 6 4 1