5x^2-7x-8 when x=4?

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2007-12-03 03:54:18 · 3 answers · asked by Boogie 2 in Science & Mathematics ➔ Mathematics

5 * 4² - 7*4 - 8 = 5 * 16 - 28 - 8 = 80 - 28 - 8 = 52 - 8 = 44

2007-12-03 03:57:18 · answer #1 · answered by antone_fo 4 · 0⤊ 0⤋

just substitute value of x=4 in the ques
5(4)^2-7(4)-8
5(16)-28-8
80-28-8
=44

2007-12-03 04:02:07 · answer #2 · answered by p♥♥ms 2 · 0⤊ 0⤋

the answer is 44

Raise the power first, then multiply, then add-subtract

2007-12-03 04:00:15 · answer #3 · answered by Rich 7 · 0⤊ 0⤋